He talks to his baby mama every day?

I've been dating this guy for about 6 months now and his baby mama will call almost every day. They do talk about the kid but he will usually go into the other room and last night they were FaceTiming and she was telling him "oh my god our son looks so much like you" and they talked for over an hour. Is this a red flag or just normal?
He talks to his baby mama every day?
Post Opinion