Invite your best friend to have fun with my girlfriend right at the pool, it's super enjoyable.

That afternoon, the villa with a private pool seemed quieter than usual. Sunlight filtered through the leaves, reflecting on the clear water. She, in a snug bikini, highlighted every curve under her wet skin – lying on a float, her eyes glanced at her boyfriend and his best friend who were sitting nearby sipping cocktails.
“Let’s go swimming, the water is really nice today...” she said, her voice tinged with playfulness. As all three of them entered the water, the distance between them gradually blurred with each small wave.
Her boyfriend swam closer, wrapping his arms around her waist under the water, while his best friend also approached from behind, his eyes unable to hide a curious desire. She didn’t pull back; instead, she tilted her head and smiled, whispering in her boyfriend's ear: 'What if… we try something different today?'