Girls, hello, it's possible that it's not relevant, but I still wanted…

Girls, hello, it's possible that it's not relevant, but I still wanted your opinion, I don't even know how to react... Twice I am married, my son from the first marriage and daughter from the second husband. We have been together for three years. The daughter was born, and he says that with the first child they look very similar, as if the daughter is not his literally according to his words. I explained to him first of all that they have one mother, and secondly that small children are similar in some way to appearance (children up to a year old).