Yes, it means she has some fond memories. That's good, but she is choosing to walk away from them. Give her what she wants, freedom from the obligation to have dinner with her H and kids.
Took me a long long time to finally get through my thick skull that the only thing that gets through their thick skull is the full consequences of their decisions. Guess what? She doesn't want to be married any more? Then no more family dinners. She's shown her hand, she has told you about something she is going to miss. Giving it to her now will just reinforce her decision to end the marriage, as it demonstrates that she can have her freedom, AND pick and choose the tidbits she misses from her M. Do you want her thinking "Hmmm, this being separated isn't so bad after all. We had a nice time all going out for dinner, and now I can relax at MY home without having to deal with XYZ. Life is good!"
I speak from the experience of doing it wrong for a long time.
