Keep standing and wait for Tim?

I stared down at Rochelle as I stood there on the deck waiting for Tim. I was beside Rochelle on the deck and just slightly behind her. She had the back of her chair tilted slightly so she was lying back a little, able to catch more rays. I couldn't tell if her eyes were open or closed as she was wearing large round sunglasses.

"Did you remember your sun screen?" I joked, remembering her lecturing us before the trip.

She laughed, and turned her head back to look at me. "Yes," she said. "Well, sun tan oil anyway. I have to be careful though not to overdo it." With that, she reached over and just slightly lifted the right shoulder strap of her bathing suit. "I don't want to be multicolored."

She was making a joke about being tanned or burnt or white or whatever, but I wasn't really paying attention. When she lifted the strap, I could see so much more cleavage and the soft, round curve of her right breast. From the angle I was on, I could see right down her top, surely almost seeing a nipple! I don't think she realized how much skin she showed due to how she was sitting when she made that little movement.

She lay back against her chair again, soaking up the rays. I continued to stare down at her massive tits through my sunglasses. My cock was making a huge tent in my shorts. If Tim walked out now, it would be a little too obvious what I was doing. And if Rochelle turned around and actually looked at me, she'd see my hard on trying to **** its way through my shorts for sure.