In the bathroom together

You tell Beth that you need to get cleaned up, and suggest that she help you out with that in the bathroom.

"Of course, sir," she says in her husky voice with a smile forming on her face. She leans in to kiss your lips briefly, then takes your hand and leads you to the bathroom.

Once again, you notice that there should be more than enough room to share in either the tub or shower with your companion. As you decide what to do, Beth walks over to the cabinet beneath the sink to retrieve a wide variety of pleasant-smelling soaps, towels, sponges, and other bathroom supplies. As she bends over to reach under the sink, her perky, tanned round ass raises up with her pussy on full display. You watch her hips sway back and forth as she hums to herself. She might be searching around for something, but it seems more likely that she's presenting herself to you. Your cock is growing hard again in response to her lewd teasing, and you start absent-mindedly stroking yourself.

It occurs to you that you could just take her now from behind like this if you really wanted, or just stick to the original plan and wait a few minutes more. Either way, it seems Beth is curious to see what you do, and she seems eager to get started on servicing you any way she can.