I've lifted 4 nights in a row...managed to "sneak in" a lifting session on my parenting days. by chance I was done with work early and was able to squeeze in an afternoon session before i had to pick the boys up from daycare.
Still only able to do 15 reps 1 out of every 3 sets (obviously the first one). So will continue to work on this.
Just goes to show that even if you are really busy, one can usually carve out a little time each day for some form of exercise.