You name two people, the lawyer and the woman, before stating that "she" reincarnates. As we don't know the sex of the lawyer, so both could be female, "she" could be either. The statement that she reincarnates inside "his wife's womb" does offer some clarification, as we then know that one of the characters is male. Since it can't be the woman, it must be the lawyer. So "she" must be the woman. It all seems clear enough, but it does take some additional thought processing for the reader to come to these conclusions. You need to avoid any confusion, as that will put potential readers off straight away.
By the way, if you want somebody to read your screenplay, I'd be happy to look it over.
Thx and thx! Will see if it can be sent via this site.