Dating a guy with kids

Well I met this new guy and we starting liking each other instantly and he told he had a daughter which I was kinda iffy about because I don’t have any kids but I just excepted it well fast forward 3 months later he tells me that this little boy might be his and turns out he is his son to so now he has two kids and they are by different people and I don’t know how should I feel about this like is their more kids that might be his I don’t know what to say he asked me how I felt about it and I honestly don’t know how to feel anybody else dating a guy who already has kids