I think it's more like she feels the void of the OM and is looking at something to fill it. She hasn't apologized for her behavior so when someone else comes along she's going to go to him rather than stay with OIN.
Continue with the positives and show her the bright spots of living with you OIN.
Mr Bond this has been debated to death already.. WS' VERY RARELY APOLOGIZE for their behaviour explicitly early on... and some never apologize at all...
It's not a realistic expectation to hear an apology at this time...
It follows from that, that the absence of an apology does not mean the WS is pursuant of another affair... All one can reasonably conclude is that they don't want to apologize at this time...
