I (23f) and my sister (21f) Have always gotten along really well the problem started in middle school when i got my first boyfriend of course she started flirting with him the first time i brought him to the house and when i confronted her she said that she was just trying to be the cute little sister. I was right tho because the following week he dumped me and started dating my sister.

Now here's where the problem got bad. My now husband and i were expecting our first child and after 9 months our daughter Desiree was born and her twin brother Dominique. After they were born my boyfriend became very distant i thought he was cheating but he of course denied it and i went through his phone (Which i felt bad about) and i found nothing until.

One day at a family gathering at my house they babies were sleeping in me and my husbands room and i realized their pacifiers were still in the nursery so i went in and i say my sister and my husband making out they looked shocked then my sister confessed that she was pregnant and he was the dad his jaw dropped and he said it was a mistake i don't know what to do because as much as i hate him raising two newborns alone is going to be hard i already get barely any sleep this would be sleep deprivation btw to add i screamed when i saw them in the nursery so everybody did come upstairs and see what happened my whole family is saying they are going to cut off my sister and that i should get a divorce and now my sister is sending me a lot of text asking me to forgive her and that he is just a man my soon to be ex is also sending me messages saying that he won't ever cheat again and that he doesn't see himself settling down with my sister because she will throw herself out to anyone.

Edit:I don't know what to do my babies are asleep right now and my soon to be ex is here asking to talk it out im sitting in my bedroom as i write this post what do i do!!!!!!!!!!!!!!