Perhaps she has a plan or maybe she just wants to be hostess. I think you are right about it being a long way off and lunch is not required. Listen to your S and be non-committed because you don't have to decide anything right now.
Hang in there.
M:25 years at BD w/ 2 daughters BD: 5/14 Separated 6/14 - H moved cross country w/OW D Final 9/17
“I can be changed by what happens to me. But I refuse to be reduced by it.” ― Maya Angelou