Legal Question in Family Law in Texas

I'm not completely sure I understand your question, but if it's whether there's some way for him to legally marry you without divorcing her first, then the answer is that no, there is not. If the question is whether there's a way for him to divorce her even though he doesn't know where she is, the answer to that is yes, though it wouldn't be easy considering they've got kids together, and there's the potential that he could end up owing quite a bit of back child support if he opens up that particular can of worms, though he would probably at least be able to see his kids again. IIf he really can't locate her (which may or may not be the case), it would probably not end up being a cheap, easy, or quick divorce, given the issue of the missing wife and kids, but it could be done.