If in fact it is MLC, nothing that you do is going to make this any faster, however by trying to work on the marriage, touching, pursuing, saying "You look good" is going to slow down the process.
This is all conterintuitive. The best thing is to push her and OM together so you are meeting none of her "NEEDS" and he must meet them all.
You do not want to be in a relationship with her while she is in one with someone else.