Ok I have a really big dilemma. See my soon to be ex step-dad
Has started dating again, and I'm so pleased for him that he's happy. His new girlfriend has 4 children, which to be honest I was really jealous about. But I've never met them, I only talk to her 16-year-old son and he calls me his sister. Which is nice and all but I find it uncomfortable
How can I tell him to back off a little without offending him?