Remember, for 6-7 weeks she was getting the best of both worlds. She got her physical (sorry) and emotional needs met by her OM, and her emotional, financial and stability needs (not sure about physical??) met by you, who was pursuing her in spades.
Think what kind of entitlement "high" she must have been riding. Her affair was a secret (secrets are fun, and intriguing, and taboo and exciting), and she had TWO MEN pursuing her.
That all just came crashing down.
The dynamics of THEIR relationship just changed dramatically (and so did yours). Their conversations and interactions are going to be 90% about YOU now (what's Sho thinking? What's he going to do? Has he seen a lawyer? Etc).
