My Lesbian Sister update

I'm Andrew and my sperm got my sister Heidi pregnant and I also fucked wife Helen and got her pregnant. Early last month Heidi and Helen asked me to get them both pregnant again, I asked when do you want my donations. Heidi replied We're not trying that again after the last time. You can give us both a direct injection each and hopefully get us both pregnant at the same time. I looked shocked I supposed and Heidi added Yes I know you fucking me is incest, but using your sperm is also incest so we should just fuck and not be prudish about it. I said Alright and we have had three tries so far. So I'm to sleep with them every cycle till they get pregnant.