Dude, your W did NOT just get pissed at you last week. She has been totally pissed at you for at least a year and probably way more! This is not new information or news. She got pissed at you for flowers, going to her gym and all sorts of things since you have been posting here. Frankly NOBODY cares if she is pissed or not but don't act like you were unsure how mad she really was. She walked out on you and never turned back - IMO that is a very clear clue she is pissed/angry and done.
My point exactly - your W *is* trying to change her circumstances but it's not the change you want. She wants to sell the house, get divorced and move on. Hell, that is LOTS of change just not the desired change for you. And you *have* been supportive of this sort of behavior from your W for a long time because you were to afraid to "rock the boat". Now though you decided enough is enough? You did that because she wants to date. In her mind (I bet and yes I am mind reading) she has wanted to date all along and tried to end the marriage before she did start dating but you took too long to listen to her desires. You didn't WANT to end the marriage and now she has had enough and will no longer wait on you to cooperate.
I have been saying all along you are very foolish to not require your W to help with the house. Nobody likes doing housework! Tough. She wants the cash she does the work. Simple. Most 5 year olds get it. But you never put that boundary in place so why now? Because you are pissed she is dating.
She doesn't help because you never pushed that issue because you were afraid to tick her off more. We all said all along she should be helping but you said "no, I will just lead and show her I can get it done". Well, you gave her a free pass not to help under the guise of leading which was all a ruse to not rock the boat!