text: I think to incorporate an "in memory" favor would be in poor taste.  I think the idea is very heartfelt and sincere, but not appropriate for a wedding favor.  The idea of a favor is to provide you guest with a memento from YOUR special day. I can understand why it is important to include her in some way, and I think it's important that you do. Have you considered acknowledging  her in another way?? Maybe a toast, special dance, or something like that?  Good luck.