@Paul Raven yes to all of what you said. No build up. Devon "lonely" while Amanda is out of town taking care of ill family in Virginia. Abby entitled and whiny and claiming neglect - because Chance wanted to stop for a cup of coffee by himself after work to unwind before going home to her. Abby whines to Devon and they have sex in multiple positions/surfaces of his condo, out of nowhere. And Chance and Amanda walk in at the end of the SAME episode. busted immediately.
And yeah Queen Mishael gets to shine on her way out.
It seems like a hastily thrown together thing to accomplish two goals, to write an exit for Mishael who wants the freedom to try other things and to spend more time with her extended family in Toronto, and to break up this Chance and this Abby who have zero chemistry.
Devon told Amanda he had no idea why this happened, he said it just happened inexplicably.
So weird, it all happened over 2 or 3 consecutive episodes. The sudden sex, the discovery by their partners, and the relationship breakups.