(1) You remained calm. (2) You validated her feelings. (3) You laid out that SHE would tell the kids - WISE choice. Is she going to tell them you are definitely D'ing? Otherwise, why trouble them (unless they already know).
Well done. Althought I am sure it's not where you want to be.
Oh, and DO NOT move out of the master bedroom. That's the marital bed. SHE chose to leave that bed. She can come back if you want her to. But, tough sh!t that the guest room isn't to her liking.
