I struggled with this as well. I then thought about the kids need both parents. I will not jeopardize the relationship with their mother. They will eventually know the truth. I won't deny that I would like it to work out if they ask.
It is very hard to not lie but also protect certain things.
M 37 W 34
T 12 M 8 D 7 S 4
Need break 4/12/15 W no ring 7/7/15
Separate room 4/12/15 Separate living suggested 8/15 W moved out 11/1/15