Perhaps what you really found disgusting was the thought that in order to be Peter's father he must have had a sexual relationship with the child's mother ln other words, with your mistress.
احتمالا چيزي که حال تو رو بهم ميزد اين فکر بود که... چون اون مَرد، پدر پيتر بوده... حتما با مادر ِبچه رابطه ي جنسي داشته.