it probably doesn't matter to her that you give her the money back, it is just the principal of buying it!
I suggest you just take your money and buy a 15 dollar itunes giftcard, so everyone wins!
Buy an Itunes gift card with your money pay for the show that way. She can't say anything about that since you are not using her credit card.
Why don't you just watch it online for free. It's really easy and doesn't cost anything. Your mom doesn't want to waste money.
If you have something like On Demand or another thing that has shows already on your tv, you can get on the menu and search "bring it" and see if the first episode is on there already (or when it will come on tv next) then you can record it or know when to watch it.
So I go on ITunes to buy the first episode of Bring It with my money (allowance) and when I show her the first episode so shell buy it she says ''Im not buying one episode for 1.99" and even tho she's not buying it I am I just search for the whole first season and when I show her that she goes " I'm not buying that for your iPod! It's a stupid show" then I said "I don't think it's stupid" then she goes "well I do" and the thing is SHE'S NOT BUYING IT I AM!!!!!!!! It's my allowance not hers so I don't understand why she's acting like she's losing 12.99 when I'm basically giving it back to her all she has to do is put in her freaking password! Can anyone tell me why she won't put her password in so I can have the bloody season!!!