Lead the way.

"Sure Ellen, lead the way!" you say. She winks at you and turns around, heading back towards her building. If she looked nice in that towel from the front, her back isn't worse off. Slender, smooth legs go all the way from her bare feet on the asphalt up to here the towel ends, after about one third of her thigh. As she walks, her full, wonderful ass sways to and fro under the towel, giving you an instant erection. She's just as stunning as always.

"Here it is!" she says, looking over her shoulder at you as she reaches a door. She pushes it open and enters a hallway, heading for the elevator. A thought strikes you.

"Hey, Ellen, lets take the stairs!" you say, nodding towards the steep staircase at the side of the elevator door. She looks at you with raised eyebrows.

"But its on the third floor!"

"Yeah but I've been driving all day, I could use some excersise. Come one, lets take the stairs." She shrugs, smiles and sets off upp the stairs. You quickly move in behind her, climbing a few steps behind her. Your view is even better than you had hoped. Her firm thighs work as she climbs, and the stair is steep enough for you to see up under the towel if you wait for her to climb enough ahead. Which, of course, you do. Gazing up at her halfway up the first staircase, you can see the bottom half of her amazing ass cheeks under the towel, and between them, a tight, clean, bald little cunt, getting squeezed between the thighs for every step she takes. As she reaches the first landing, she looks back at you.

"Enjoying yourself?" she smiles.