This is fantastic (she said, finally starting to read the snarry_games stories a month late). Seriously fantastic. There's such love in their relationship and it provides a perfect counterpoint to the things that are slipping away from Severus - and from Harry, to be honest.
A very smart and very realistic portrayal of what we often see at that stage of life (god knows I've seen exactly these things in my own famly)- and how wonderful that they're finding a way to let Severus and Harry meet their end with as much independence and dignity as possible. Easier, perhaps, in the wizarding world, but a good model for us all. Well done.
(btw...I'll be adding this to my recs page at the next update)