Seems she got some high pressure sales BS from a trainer at one of those big-box gyms. Little Miss Trainer told her if she wanted to lose X number of pounds it would take X number of sessions, so pay up X number of dollars, please. This is crap. There is no magic number of sessions that equals a set amount of weight loss.
So, if you're being sold a bill of goods that sounds to good to be true, it probably is. No set number of sessions, special supplement, or gadget is going to give you the body you want. You are going to have to work at it. The more effort you commit to your goals, the better (and quicker) the results. Likewise, if you putz around, don't expect much in return. It's up to you.