I’d be more direct with time and place, and less with why and what. I’d also consider neutral ground for your meeting too. For example:
H, I wish to discuss our current living situation. I am free on Wednesday. Let’s meet at <coffee shop name> at 2:00 pm.
Write down what you are wanting to cover during the meeting, so as to not miss a point when things get dragged off course. Keep it straightforward and businesslike.
What outcome are hoping to get from this meeting? Is it obtainable? Knowing that, will help keep the meeting on track as well. A legally binding separation agreement cannot be hashed out at a coffee shop, however confirmation of intent could be achieved.
Have a great break with the kids.
D
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.