7 months seems like a long time to be co sleeping, let alone breast feeding, but that's just my opinion. If it were my baby, it would at the very least have it's own crib, likely it's own room, at this age. And probably would have the baby eating solids, maybe I would still breastfeed, I don't know, but I don't think a 7 month old needs boob milk twice a night. But that's just my opinion.
Clearly it is making you miserable, so I suggest either get a larger bed (if you're not already in a king) or go sleep on the couch. Or the floor. Or a motel. Worst comes the worst, get the teenage son on the couch in exchange for some extra allowance $$, so you can have his bed. You can't be nice to anyone else if you're miserable, and this is making you miserable, and I don't blame you.
But when it all comes down to it, you need to talk to your wife in a non-confrontational way about this. 7 months is a LONG time to get no sleep, and I don't care how heavy a sleeper you are, a baby kicking you constantly will make for a bad night. 7 months, and the bed will only get smaller, as the baby gets bigger.
Stumbled into Primal due to food allergies, and subsequent elimination of non-primal foods.
Start Gluten-Free/Soy-Free: December 2012; start weight 158lbs, Ladies size 6
Start Primal: March 2013, start weight 150lbs, Ladies size 6
Current: 132lbs, Ladies size 2
26lbs lost since cutting the crap.