If there is a relationship with another man taking place, she would need to leave my house. Period.
We love our kids and we do our best to protect them and make this as easy for them as possible. Protecting my kids would mean not letting them see that it's ok, not only to violate and discard your marriage commitment, but to do it right in front of the one that you made that commitment and those promises to.
Of course, you don't know for sure, and I understand that. I would not in any way hesitate to make these feelings known to her, even to the point of asking her point blank if she is involving herself emotionally and/or physically with ANY other man. These are reasonable conditions on your part to her continuing to have the privelige of staying in the house.
Just my opinion.
MLC or no MLC, we are not required to live in humiliation while our one time spouse flaunts a new relationship in front of our face.
Blessings,
Bill
"Don't tell me the sky is the limit when there are footprints on the moon."