Keeping quite about the sexual abuse I think required now. Earlier, probably, you was young, you wouldnt have have spoken about it.
Whereas , now, it's not so. If you wanted to come out of it, sit and discuss with your family members and do resolve it.
As far as the second issue is concerned, the law doesn't allow this. It would still support that man's wife, if she files a case against you.
If the man wanted to divorce her and come and marry you, then you will be safe.
Think about it.
Next Steps
If you still wanted more clarity, do visit a Psychologist and do understand it bett.