I have a Jam2 and I'd have to check on the BV500 canister but I'm thinking it might be tough to fit much of anything else in.
What my husband and I did was he carried the BV500 in an Atmos 50 and I carried the first nights dinner outside the bear canister.
Our trip was only 5 days, but were carrying 2 dinners for our group of 10 (20 dinners) and our breakfasts and lunches. We find for trips that are 1-5 nights at altitude that we just don't have our typical appetite. We have cut the amount of food we bring way down over the past few years.
At any rate, depending on how you are sharing the rest of the things she might bring we just find it is easier on me to not carry a bear canister. Not sure if you plan to resupply. If so, then you can likely get away with one canister between the two of you.
I'm 5'6" and use the women's size large Jam2.