I really like the art in Rune Factory, but Mais the main character looks too much like a young girl. When I see him on the official site with pictures of potential kids, he doesn't look like he'd be the father...
I'm still hoping some time, ever where you can play as a girl =( It's not as fun courting girls when you're a girl.
You can only ever be sure that your mother's your real mother or not. The only way to really know if your dad's really your dad, is by a DNA-test (or looking like two drops of water like him, which is pretty much the same, but most people don't). Who says, in Rune Factory, that the kids aren't actually from your rival? No way to be sure