An Unintentional Roast
She won't be showing her midriff for a long, long time. that's a completely perfect burn, and the pain of those lost hours in the sun will stay with her for days afterward. At least it's just in the one spot.
She Forgot To Take The Tags Off
Looks like that brand new bikini wasn't the perfect choice for a day out in the sun after all. If she was planning on returning the swimsuit after, she could probably get a lot of money back if she includes her pain and suffering on the receipt.