Pair Silver Plated

I sent a pair of earings Sterling Silver to a friend for a favor recieved…they tarnished when she got them.?
Should I send another pair? Sterling Silver does tarnish unless it is rodium plated.She did raise a stink.They where brand new. She got them 3 months later in Isreal.Is she being ungratefull? No monies were involved in favor recieved.I also did not want this person to spend money rendering favor.(wasn’t expected)
She’s being ungrateful. Offer to polish them with toothpaste for her, since she doesn’t know how to take care of REAL jewelry.