Should he mention he has kids?

Been seeing this guy for about two weeks. We went on two dates so far. I searched for him on Facebook and saw he had two kids on his cover. I thought it was his siblings but no on the caption he said they were his kids and the comments were saying they were his twins. I also found out he used to be married. On his old photos from years ago, there's tagged an old account with a girl with his last name. She has a new account with her original name and they aren't friends. She has the same kids on her FB cover. The last time he posted her was years ago. So im guessing they are divorced. I found all this out before we started dating. He hasn't mentioned his kids yet or that he is divorced. He lives with his sister and her kids but he talks about her kids to me and introduced me to them.
Should he mention he has kids?
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