Rachael chuckled as she felt the muscles in Andrew's ass clench up.  She hadn't intended for it to go any further, but wanted to tease him just a little bit.  She slapped his ass playfully.  "Come on... you're all lotioned up on this side, " she told him.  "Roll over," she said.  Rachael waited for Andrew to settle back onto the lounger before applying lotion to his hips.  This time, she let her hands move between the front of his legs, the tips of her fingers brushing against his balls.  She watched him, a playful smirk on her face, as she moved her hand higher, wrapping her fingers around his erection.  The slick sunscreen allowed her hand to glide easily up and down his length, a motion that she continued for far longer than was necessary to apply sun screen.