I've not come across that in the info I have for my province, although I will talk to the L about it.
From what I understand at the moment, my W and OM have an agreement that they will not behave as a couple when our kids (I'm guessing or his) are around. Of course, I'm not even supposed to be privy of their R (W still lies, directly or through omission) even though only adultery is applicable and only regarding waiting period to file D.
Whenever my W and OM spend overnights / weekends with each other, I understand that my kids are elsewhere.