Please, please, please don't make her wear her diaper by either putting it on backwards, putting her in clothing she can't remove, etc. -- because essentially, that would be forcing her to sit in her own poop. And that's just ewwwww - would you want to be forced to sit in yours? No. And what about if you are ever old and have to wear a diaper... don't you hope someone changes you ASAP? Your daughter, at 2 yrs old, is trying to tell you in every way that she knows how that she doesn't want to have poop in her diaper. If she does this at the same time every day, you have *such* an opportunity to help her learn to do this in the potty. And 2 yrs old is prime age for potty learning (it's NOT too young!!!). If you strap her diaper to her now, force her to sit in poop for an hour while you have some quiet time, don't be shocked when you try to potty train her later and she doesn't want to poop anywhere else BUT her diaper. Please know, though, that I absolutely DO empathize with needing some quiet time to yourself - it's super important for us moms to recharge!!! Is it possible to do it at some other time in the day besides prime poop-time for your daughter?
Go pick up a copy of Elizabeth Pantley's "No Cry Potty Training Solution" (http://www.overstock.com/?page=proframe&prod_id=2014698) and follow your daughter's *very* clear signs of being ready to start potty training.
Again, I beg you, PLEASE do not force her to keep a poopy diaper on - instead, offer her to sit on the potty around that typical "poop time" and read some books until she relaxes and goes. Be supportive, relaxed, matter of fact. Don't be afraid of accidents - they help her understand how her body works and accelerate her learning to get to the next level - just supportive, loving, matter of fact. Clean up together. Model for her what it's like to poop in the potty. Watch her for physical signs (farting, grunting, bearing down). Keep her diaperless w/ a little plastic potty nearby. You guys can do this as a team and have fun with it together! P.S. - When she does start to poop in the potty or if you put her in for quiet time and check on her periodically for the poopy diaper then change it, it's very likely that she could fall asleep again for her naps. Again, I vote for trying the potty here, but do what you need to do. :) Also, I second what a previous poster suggested about an earlier bedtime. When my daughter gave up nap, the earlier bedtime was the saving grace!