I would actually say her life back then was even lazier than when she got with Destiny, I think she just tried to control herself more when it comes to eating, she had a little embarrassment still at that time because of Krystal's parents, also they both had less money to go out and eat crap since neither of them worked.
She is lazy and she loves food, that's a terrible combination and the more confidence she get's with someone the more those 2 come out.
I remember those videos, her going to the gym didn't last long and everything that wasn't them going out to eat was extremely rare oh and she had the task to do the dishes, other than that they were always home doing nothing.
A lot of people think she started getting weight after she went with Destiny but that's not accurate. She started getting weight when she was at Krystal's still. If you compare the videos of that period where she did the dancing etc and the videos where she was about to go to Destiny she was clearly bigger. Of course, once she went with Destiny things went completely out of control and at some point she even admitted it that basically to her living alone meant going out and eating all the crap she wanted everyday.
The only think I will admit is that she was pleasant to watch and even her laugh was pleasant to hear back than, but she said how she acted was fake because she was camera shy and this is her true self.