Just something I would like to add about giving ultimatums and mindsets. If your spouse is cheating on you, and they are a stake holder legally in the mortgage, property, etc. You cannot force them to leave, but, you can ask them to leave. If the police are ever involved, and you are demanding that they leave or GTFO, Its going to come down to legalities, behavior, and what is best for the children, etc. What I am trying to illustrate here is, if you are going to give an ultimatum of work on the M, or GTFO! You better have the lawyer consultation, and legal standing ground to back it up and maintain your authority to remove your W from the premise. The other thing is if you are asking them to leave. Do not ask them from a place of your own emotional benefit. (You are going to have to suck this up, if you don't have a legal leg to stand on as far as deeds, assets, etc.) The only reason why you would ask them, and should be asking them to GTFO, is because you are protecting YOUR CHILDREN from exposure to AP OW or OM and your WW poor choices, especially within your household within your legal rights. It has to be "for the children" or you will lose legally in court if your W decides to fight you for anything.