Hi Margo,
First of all, way to go on your almost 90 days - you should be very proud, as I certainly am.
I am still very codependent when it comes to my parents and generally just try to avoid them.
But it's harder to do when they're physically in your presence, and for a whole week? I wouldn't make it!!!
Hmmm, not helping, am I?
I think you'll probably have to indulge him in one, maybe two pity parties. After that, try to gently change the subject when he brings it up again or if it gets too bad, calmly tell him that it upsets you to talk about such things and that you would rather talk about something else.
Or, plan a bunch of activities and keep him busy so there won't be any time for serious chats!
Like Phoenix said, make sure you plan your own time for regrouping and, uh, recovering.
The week will be over before you know it!
Love and hugs,
JG