Is this normal for a father to tell his daughter?

My dad is a little bit older now (70) and can’t handle his alcohol too well. He was drinking a few beers, and then we were talking about my cousin and he asked if she has kids and I said no, but her husband has two kids (boys) already. He then says, that reminds me of a porno, where the step son is home alone with the step mother and you know. I immediately stopped him and said dad what’s wrong with you??? Why would you tell me that.

I know he jokes like this with his friends but to tell his youngest daughter that? I’m 25. I know I’m old enough to hear his “jokes” now, but I think that crossed the line. Idk how to even be near him now, I feel weird and disgusted he would even mention that.