Tom were at a Hotel that were near a beach with Bill aka this twin brother and you, Tom's girlfriend, who is basically Tom in a female version and no one even notices it. You and Tom were in the water, you in a black and white bikini and Tom in a black swim trousers, his dreadlocks wet from Bill splashing water in his face. Your hair were in habesha braids, the tips of your hair wet from touching the water.
Bill eventually goes into the water again, his swim trousers getting wet instantly from touching the water, holding a fully water gun behind his back, planing to spray Tom with it. Which was easy, because Tom's back was facing him. You were in front of Tom, fishing a shell up from the water.
Tom didn't notice Bill, he was to boss looking at you.