wifes sister wants help

my wife's sister came by and wanted to talk to her they went to the bedroom and were gone for a while after they came out she left. i asked what was that all about my wife says well it is a strange thing she asked me. she was been trying for over two years to get pregnant and no luck. her husband Bob has a low sperm count she told me. so what i said well she wants a baby so bad she asked me if i would be ok if you got her pregnant and Bob would think it was him. i said really and you would be ok with fucking your sister to get her pregnant.

my wife says i think so she wants me to be with you and her when and if you agree to do this. i said well she is a hot little thing and are you sure you good with this deal. wife says yes she wants a baby so bad.
so we can have a three some then, wife says no just you fuck her and get her knocked up should not take but a few times in she comes over when she is fertile.

then wife says would you do it for her i said only if it is not a problem with you i would. wife says ok i will tell her and she can tell us when she is ready. about a week or so later sister was here and the girls were talking then my wife says come with me she is ready in the bedroom. i went in and she is under the sheet and still has her top on. i said you have your clothes on she says just the top no bottoms just get between my legs and fuck me and come in me is all i want.

i did as she asked my wife was right there with us both, came in her in a while and she thanked us and went home. two days later she is back i told my wife i wish she was naked it would be more enjoyable to see some tits and maybe she would not just lay there like she was dead.

i told she how about you get naked this time so it is not so boring. she says you don't need to see me naked
i said i would enjoy it more and you just lay there like it is nothing. wife says sis get naked and you might like this more if you got into it some.

i told my wife i am going to eat her pussy and see if the brings her to life. sis was in bed sheet pulled up to her neck and i saw she was naked i pulled the sheet off her got between her legs and moved down and pushed her legs apart and got right to her pussy she says what are you doing i said trying to enjoy this more just relax and see what happens.

i pushed my tongue in her as deep as i could and then went to her clit and sucked it and nibbled on it i got bigger real quick. she says this is not part of the deal. i said it is now if you want to get pregnant.
my wife told her to relax and enjoy this he makes me come so good when he goes down on me.
sis said bob has never done this to me ever, wife says well now you have had your pussy eaten.

i got her going she was pushing against my face and going oh oh oh and my wife smiled and says see its great isn't it. she then had a climax and finally said that was something else. wife says see it makes it more fun this way and go ahead and fuck her now and come in her then eat my pussy this show made me horny as hell. i fucked her hard this time not easy like before. then licked my wife to a great orgasm and her sister watched all of this. later we all were having coffee and sis says can he fuck me again today and lick me too.
wife says you like this don' t you, sis says i do so much i had no idea it could be this way.

we had another go she was leaking come and i ate her till she was begging me to stop it is so intense she was crying, i then fucked her hard and fast came again in her and she was spent for a while she even slept some.

wife told me it excited her to watch me fuck her sister like that i said i like getting her going like that. she must have a boring sex life with Bob. sis called and said she is not pregnant yet so call we keep going till she is wife told her yes as she liked to see her getting fucked and turned on like she did.

some days later she came over and told wife Bob was going to be gone for a week for work, she wants to stay that week here and have sex all week if that's ok. wife says sure we can do that.
she got here and i ask her are you wanting something new besides what we are doing she says what i told her i will surprise her.

sis and my wife went out and when they came back my wife says we went to the adult store and we bought some things. oh really i asked what sis says i have a long skinny dildo with a vibe in it and a big latex cock
cause i was talked into it and your wife told me that she was going to use them both on me and you can watch us. well i am for that when do we start they both said tonight.

well they were on the bed all naked and wife tells sis get on your hands and knees and relax then she took some lube and lubed the dildo and then sis asshole then she says what are you going to do to me i said she is going to ass fuck you with that dildo. i have never had my ass fucked ,well you are now. next wife started the dildo in her a little and turned it on sis liked that as she worked it deeper in her she was responding to the vibe and depth it was at. then she started fucking her with it long deep strokes slow the faster sis was turned on and her pussy was dripping and she was pushing for more i watched and was so hard i said you think i could fuck her ass in a while wife says i was hoping you would want that ass.

sis heard me say that and says i think your to big to go in my ass, wife says just wait and we will see she pulled the dildo out and had the big cock ready and pushed the head in her and kept going in till she was coming so hard then fucked her with no mercy. then pulled it out and i went right in her ass to the bottom of my cock and i hard fucked her till she came again and i did too.

turned her over and ate her pussy till she came again and then tongued my wife's pussy till she came
wife said well sis how was that she told us she was so wet and spent and all shaky inside.
my pussy is pulsing too. i went down on her again and sucked her clit till it was huge and red pussy leaking a lot then my wife said i want to taste her pussy and you fuck me from behind.as i fuck my wife she bite her sisters clit and then rubbed it with her thumb and she came again. by then they both were wet and leaking cum and sweat.

next morning i was balls deep in sis first thing legs up and against her chest and was dep fucking her and i hit bottom a time or two and she says that feel so different. my wife then says lets try something i just thought of i will be right back.

she came back with the long slim dildo and says it all clean so let me show you, sis what are you going to do now wife says spread your pussy lips and i will push this in your cervix and leave it in you till it spreads open and stays open and he can cum in you and his sperm will go right in you were it needs to be.
i said you are a pervert wife she says yes isn't great.

she pulled it out after a while i fucked sis till i came in her and we kept her tipped up for a half hour.
after that sis wanted us to put the dildo in her cervix again as she says it feels good and fuck her with it this time, wife told her ok but tell me if it hurts you. i said let me do it this time she says be gentle wit her.
i eased it in her found the opening and pushed slow till she says stop i feel it real good this time i then slow fucked her with it and as it went i was getting deeper in her cervix then she says fuck me again now.
we did then wife says do that to me next i want to feel what its like when its in my cervix which is the door to the uterus and baby making.

sis says let me do it to you so they got all set and she do good got right in the cervix and pushed till wife says stop it is feeling weird now the sis fucked her slow with it and rubbed her clit till my wife came hard.
this may have worked cause sis missed her period when she should of had it and the girls were excited.
she had Bob fuck her when he got back twice the next two days just to be safe. she wanted and no period the next month and called us and said i am pregnant for sure. i miss doing her and the wife together maybe i can talk them into it again.