If my exh's (from my 1st marriage) father died or anyone in his family for that matter I would have gone to their service also. I wouldn't have sat with the family, since we are both remarried, but I still would have been there. I am still very fond of his family and always will be. They do a lot for our kids.
I think you did a great job in how you handled things, but I also caution about false hope. Your W is going through a lot right noW, and I am sure her emotions are all over the place.
I think the next days, weeks, months are going to be especially hard for your W because reality will set in. When they first pass there are so many details to attend to, people to meet with, it's a whirlwind. Once she is alone in her thoughts and processes that this is final, that might make her react in a completely different way.
I know you don't need me to tell you to just be there for her, because I know you know that...just try to not get your hopes up too much.
"Everyone you meet has baggage. Find someone who loves you enough to help you unpack." ¤Formerly DelinquentGurl¤