Taking a dip! (image story in the description)

She had carefully picked out her jeans, sweater, and boots to wear to the party this evening. It was sort of a "pre-game" party before they headed out to the concert that night. It was still hot that afternoon, but it would get cool later that night so no one would question her sweater. But that wasn't her reason for wearing this outfit. She knew there was a pool at the house and that the get-together would be out by the pool. If she was lucky, someone would push her in, but if they didn't, she would pretend to fall in. She was only there a few minutes when she got her wish. Pretending to flirt with going in the pool, she was pushed in. She swam underwater, enjoying the warm water, and staying in the pool till it was time to head to the concert.

Thanks, @wavydashen, for the start and inspiration!