What would you do if you were in my shoes?

I have a Roomate that doesn't work..But she does get a check at the beginning of every month for disability..(right now she is dead broke till jan)..She has a friend name Roxy...sadly Roxy's mom is in a nursing home dying from cancer..Roxy is using her moms store credit card..(sears) and buying what she dam ell wants to..Guess she figures mom will p before the bill comes in...So last night my roomate showed me what she bought for Roxy..A complete bathroom and bedroom set of towels and bed spreads from Sears..(saw the tag)..then she also bought me a sweater and a pair of warm pretty socks.(from sears)..This is what i am guessing..Roxy gave my roomate that sears credit card to go spend it for xmas presents...To me folks this all sounds to shady..I still have the sweater in my closet and haven't tried it on yet..i want to..but i don't know what to do or think about this whole dam situation...I feel like they are thief's..am i right?...Please Please give me your opinion on this i really need to feel peace in my mind