She's all the way disrespectful. Smiling in your face. Once you start looking thru her, and you are detach that smile will go away. If that happens again, you can't show any emotions. No, curled lip, raised eyebrows, no flared nose, don't hunch your shoulders, look at her, don't stare, then turn and walk away. No need to conversate with a person that's treating you like that.
IMO, she wants a D, let her do all the work. Like you said too bad, for what she wants. If it were me. I would pack all her belongings in the MBR and put them in the room she's living in. No more talking, all action.
Don't bring up the relationship, the M, a divorce or separation. If she's willing to watch you transform into BB 2.0 allow her. Move forward with your life, while taking care of your boys, right in front of her.
And obviously she wasn't too hot for you, because you'll been married a long time. Become confident, then respect yourself, that=being attractive.
Onward and upward
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.