And I'm assuming if she asks why I'm doing this, I say, "Because it's also my house and I like living there," as opposed to, "Because you slept with another man and now I DGAF about your preferences."
One is enforcing your boundaries and standing up for what is yours.
The other is spiteful and something someone with NGS would say. I should know. I'm a recovering NGS and came close to saying what you want to say about GAF of W's preferences.