Am I overreacting

So tonight my husband and I were talking at the dinner table and I asked him if he liked being a dad .( We’ve been together for 4 years now and I have a daughter from a previous relationship that he met when she was 2 and has ever since taken care of her we also have a 1 year old baby boy together). When he responded he said “yea I love being *sons name* dad. And I said what about *daughters name* he said well she’s never with me she’s always in her room or with her uncle aka my brother. My brother has moved in with us due to financial issues and my daughter loves her uncle. But this kind of hurt my feelings because in a way he was saying that she wasn’t his and he’s taken care of her for so long and she calls him daddy. After he said that I just stayed quiet but I kinda don’t want this relationship anymore because my daughter means the world to me.