i have a couple suggestions/thoughts. i'm a bit of a leg & heel fan, so i can relate to the foot fetish thing.
Being able to paint Her toenails at a cost of 10 or 15 points...perhaps with the chance to earn a few points back for doing a good job
Earning points for cleaning high heels / boots, et cetera
Future orgasms cost more points (30 for the first, 40 for the second, an so forth...)
Humping Her shoe at a cost of 2 points per minute
Helping Her into/out of stockings/hose at a cost of 10 points
Have a point cap every day, something like a maximum of 10 or 15 can be earned, even if more could have been, such as via having been used as a foot rest for an hour.