I bet she would truly love a day where it is just you and her. maybe even the kids as well if you all aren't together a lot.
Maybe you could make her a nice dinner, her favorite, have the kids help, nice sit down dinner...if it is just you and her, candlelight, her favorite chocolates.

this week is also 5280 week if you want to take her out. Rodizio grill was delicious last night

I think chop house also has the deal and several other high end restaurants.

I am very sorry to hear this and you are in our thoughts.