My boyfriend is lying

So, my boyfriend and I have been together for almost a month and he has a baby that's like 2. But the thing is, he denies that he has any kids. I've asked him the question twice and he denied it both times. I did some stalking and I found the baby mama and wasn't back. It had pictures of a baby and had him tagged. Then I did the same with his profile and it had the same thing. So, idk what to do. What would be your guys' opinion?