had a buyer purchase one lot of 2 boys ralph lauren tees preloved.  I purchased these in roughly 2007/8 online paid a fair amount of money for them and believe them to be real.  the buyer believes otherwise and has politely contacted me and wants a return them both. She thinks one is real and one isn't.  she says she has many RL tops around her house and doesn't match up.  the 2nd tee she commented looks old and out of shape, which I don't agree with as my son hardly wore it as he didn't like it.  she's filed a return so I assume I'm up for approx $22 + post + return post?  what should I do?/ or what can i do.  I get I'll wear a defect.

I told her I cleaned out sons wardrobe ebaying several labels and gave the rest away. they're not cheap copies from bali or singapore, I know ebays policy on counterfeit.  thanks