P90X Yoga is the bomb

Ok so my bf is doing the P90X program He's on day 43 and doing AMAZING! Part of the program is an almost 2 hr yoga X (X for extreme of course) dvd. On his yoga days I usually join in and the kids often do too. This program KICKS my ASS every time! It's SO good for you!! So right now I'm doing that 1-2 times a week as well as the hot yoga 5-7 times a week, and home yoga for an hour or so about twice a week. I can feel shape taking place under my skin. I feel myself walking taller, feeling more at home in my body even though its changing daily. I feel definition at every curve. When I flex my arms at work, people don't believe that all I do is yoga....and they think I'm crazy to do so much yoga-I work the best shifts next week (11-3) so I can drop my bf at work, go to the 9am 90 minute hot yoga class, shower, work, then go to the 60 minute hot yoga class at 3:30, and be done by the time he's finished work at 5. (His studio is above the hot yoga studio). What do you consider "too much" yoga? Is there such a thing? Now...how do I get rid of this last stubborn 20ish pounds??