[FM] a night in the hot tub

This happened back when I was I want to say 19? I had gone with my older boyfriend and his family to a cabin for new years. It was my first trip with him, and I was so excited. Unfortunately, his brother decided to tag along so we were no longer sharing a room alone, which irritated me, because I loved to sleep naked and would have to wear my clothes.
The first night was alot of fun. We had played board games with his family, and decided we would all go out to enjoy the hot tub and look at the stars. Eventually one at a time, people started making there way out of the hot tub until it was just me and my boyfriend. He knew I was always ready to play around, and loved to tease me. He started by playing with my nipples over my swimsuit, and eventually pulled my top up slightly exposing them to the cold air. He then had me start to play with his dick while he slowly untied the sides of my swim suit bottoms. I knew he wanted to have sex, but I was still a virgin, so I was a little apprehensive about him removing my bottoms, but I was also too excited to tell him no. “What if your family comes back outside?” I asked him, while I kept stroking his dick inside of his swim shorts. “You would only be more turned on if they did.” He responded. I laughed and gave him a kiss. He wasn’t wrong, as he knew I loved to suck his dick around the house without getting caught by his roommates, but I told him this isnt quite the same because it was his family. He told me I had nothing to worry about, that they more than likely are playing another hand of cards. He slid my bottoms completely off of me, then had a sly smile. “I’ll be right back, I have to go to the bathroom.”
He pulled my hand out of his shorts, then jumped put of the tub before I had a second to say anything. It took me a second to realize he still had my bottoms. I started to turn around and call back to him when I remembered my top was still above my breasts, so I had to get back down quick into the water. He was telling himself off and told me he will be right back out, before stepping inside the cabin.
I looked around the edge to see if he dropped then anywhere, but they were nowhere to be seen, nor could my towel. Looking back at the cabin window I could see his family sitting around the table in the living room about 15 feet away. At least they were dressed, I thought to myself. I hoped that meant they wouldn’t be coming back outside anytime soon. I tried to calm my nerves, by looking up at the sky. He will come back, I thought to myself. But time kept going on. Maybe another 15 minutes passed before I started getting worried again. Another 5 minutes passed, and the bubbles turned off. Fuck. I thought to myself. I could see my unshaven pussy clearly through the water, as the lights were still on. I turned my head back to the window, and could see everyone still upstairs playing cards. I could also see my boyfriend sitting with them. He caught my eyes staring at him so he smiled and gave a wave.