Ladies: Would you marry a guy who abandoned his children from a past marriage?

My fathers new wife seems to have no type of remorse for my younger brother and I. I'm 20 and my brother is only 13. Our father separated from us when we were younger and not only has he forgotten about us, but his wife grew cold towards my brother and I. I found my father on facebook and found out that we have 2 other half siblings, a boy and a girl. They seem like a happy family, all jolly and smiley. When was my father ever going to tell us this? And why does our stepmother hate my brother and I, we've done nothing whatsoever. It hurts like a knife that I never got to meet my half siblings. My stepmother let it be clear that she DIDN'T want my brother and I around the kids until they were a bit older. She says she doesn't want to traumatize them.......anyways....Me being a young lady myself, I now know that in the future I refuse to marry a man who would just abandon their children from a previous marriage, I think that's just so cold and irresponsible. I mean my mother was never "baby mama drama". Shes drove us to another state to see our father and he was NEVER there! It's so easy for everybody to blame the woman in this situation, but what does that have to do with us? My father did not even show up to my high school graduation a couple of years ago....I really don't think his wife made the smartest choice by making an excuse about that either. Why are stepmoms soo stupid!?