Dear Prudence,

My boyfriend babysat my 3-year-old son for a few hours while I attended a seminar upstairs. I really appreciated it, and it seems like they had fun going out to the park. This was the first time they’d spent together without me. However, my son is now calling him “Daddy.” He’d never really called him anything before. I told my son that he should call him “Chris.” Chris waved me off and said that he actually told my son to call him that. I am furious. My son was conceived via a donor, and now I feel like I have to have the conversation I was planning on having when he was 5 or 6 a few years early. My boyfriend thinks I’m overreacting, as he was “doing me a favor.” I’m so disappointed. Other than this, he’s an awesome guy, and he’s been in my son’s life since he was 18 months old. I know my poor boy will be devastated if Chris stops coming around. What should I do?   More at www.CooperandAnthony.com