You say if you go with no one, you risk losing the children. I'm not sure why you think that. Of course, if you don't live with your children you'll see less of them, but you've already impregnated two women. You can't have exclusive relationships with both of them.
There are no guarantees on the future. Even if you picked one over the other, there's no guarantee that five years from now, you'd still be together.