We agreed to meet an hour from now as they were coming aways. I went across the street and got a room. I texted the room number and then took a shower.... It wasn't long before I heard a knock on the door, I went and opened the door. Standing there was a male-female normal looking couple, or so I thought. I stepped aside and they went directly to the bed disrobing as they went. They looked like a typical young married couple. I thought ok, they just wanted a Unicorn, which they did. They were very. "I was terrified and I desperately wanted to refuse. I didn't know what he had in mind but I knew it was going to be awful.I obeyed though. I rolled over and got up on my knees and moved over to where Nathan was sitting only three feet from my husband.They both watched me as I crawled over on my hands and knees. When I was at his feet Nathan said, "Pull my cock out and show Dennis what you have learned this weekend bitch."I looked up at him and I pleaded, "Please Nathan, please don't make me.. Then she helps me to put her bra off and wow what a scene, it was her nice, firm round shape boobs were visible by me and it made me really hot and horny. My eyes glitter with excitement while she was smiling and squeezing her boobs and giving invitation she told me pls suck my boobs and then after this, pls fuck me hard too.her voice was filled with lust. Again I hold her tight and kiss hungrily and her tongue is quick and eager in my mouth and her body was hot against mine. Now she undresses. She then continued her work in my lab itself.As we have to sit in front of a laptop in the same posture the whole day, we get stiff shoulders and back pain. She was stretching to get rid of testing shoulders. I was looking at her boobs and enjoying the view. She noticed it and again gave the naughty smile like the previous day.I also got encouraged and thought to extend this moment further. I asked her whether she needs help in any way? She asked, what will you do? I said her to just close her.