when we were teens

when we were teens my sister and i had sex when we were in high school at different times thru high school.
then we drifted apart and lived our own lives, both got married had a couple of kids everything was going fine.
one day sis called me and says she is getting a divorce and needs a place to stay for a few weeks till she gets on her feet.

she shows up with her two kids and they take over the basement it has bedrooms and bathroom so it went fine for a while, she goes to court and gets child support and they have to sell their house and she gets half of the proceeds from that. next she says when that happens she will get her own place,

to celebrate she and my wife go out and party well they came home in a cab and were drunk as to sailors on leave had to pour my wife into bed pasted out cold by now. went down stairs sis is on sofa same way drunk and then some got her down stairs flopped her on her bed pulled off her shoes and and she wants help to take off her clothes she can hardly sit up. i got her stripped naked and put a t shirt on her and she leaned back and says remember when we use to fuck when we were in high school. i said yes i do she then says want to fuck me now just for fun like we use too.

well we did just that bare back and she was pasted out before she could have a good come but i came in her and later i fucked her again and had a good orgasm. next morning she comes to me and says did we fuck last night or did i dream that, i said we did and it was great just like old times.

three weeks later sis corners me and says i missed my period and i think you knocked me up when we fucked a few weeks back. i said are you serious she says yes i am. i asked when did you fuck your spouse last she says its been about four or five months. well i guess we cant blame it on him then.
i said what shall we do now since we got this problem she says i want this baby no matter who the father is.
ok then all we can do is have the baby and hope for the best and you better stay here then.

what about your wife what will she think when she finds out I'm pregnant, i said we will tell her the truth that we had sex and that's that. sis says she will be mad as hell i am guessing, we will see shortly.

next morning we were at the breakfast table the three of us and i said honey i knocked up my sister the day you two went parting she looked at us both and said well then you better get to work on me and get me knocked up too. sis looked shocked as i was and i asked aren't you mad at us or me she then says you told me you and her were fucking in high school so i figured you would be fucking her again when she moved in here, i was right so i am good with it.