Ovulation pregnant? Young sperm from 20y stepson!

I've been trying to get pregnant by my husband for quite a while, but somehow it does not work out. Probably his sperm is already too old. Anyway, I had my ovulation today and then stood his son whom he brought into our relationship with me. Just meant he should come along with me something. He first thought he had to do something for me, but then what did he expect it. Told him that he should now fuck me nice and I should inject a young sperm beautiful maybe it works then yes. and so it remains in the family or?