I tried for almost 5 years to get my ex wife pregnant when we were married. 2 rounds of IVF included.
We've been divorced for almost 2 years.

Went to a party of mutual friend. When the ex saw me there she left with her date.
Her younger married sisters stayed at the party. Both of their husbands had gone fishing.

I flirted with both sisters at the party without either one knowing.

Both made it clear they wanted to play.

I fucked them both bareback (I was drunk). One on the neighbors dock away from the party and the other in the downstairs laundry room in the basement. Each made me promise not to say anything to my ex or to the other sister.

Two days ago both sisters called me to tell me they are pregnant!

I thought they were bullshitting me but they both came over and took the pregnancy tests again in front of me.

They said the only reason they let me fuck them bareback was my ex had told them I was sterile!

Both said they plan to keep the baby.

They seem to think it funny and don't seem worried my ex brother in laws will ever find out.