Any man willing to step up and marry a woman with 3 kids and take them in as his own has a lot of respect from me. My ex gf had a son and it was too much for me. Ive never been good with kids and hers was a real pain in the ass. She must be a really special woman for you to be willing to do that. The father sounds like a real pos. Just look at it like this, it makes you look all that much better and as the kids grow up, they will recognize it. Respect bro