Try to remind yourself-people do change as they grow.
What was "ok" to her when it was an ephemeral possibility in the future, may not be ok when it's a reality now. (the move).
That doesn't mean you shouldn't do it. But it may explain that she needs to do some personal inventory work and decide what she is willing to do or isn't willing to do to keep the relationship.
Also-just as Matt needed time alone to work on figuring that out; she may need it too.
Lots of things going on but it sounds like you are also getting some much needed progress in the family too.
"Love As Thou Wilt"