So I'm 23F, and I've been a very big cheater/liar to my white BF. It happened about over a month ago, where I went to the gym for the first time in a while, and my BF was very adamant on wanting me to go by myself so I can learn social cues/social skills, (I'm an introvert). But, he was very, very wanting of this and so I obliged, but I didn't think it'd end up where it has. Whilst going to the gym regularly, my BF hired a personal trainer for me, 27M. Now this trainer is a spectacular man, he's responsible, kind, very very helpful, he's very tall and dark-skinned. He wanted to help me out with a few squat sets when I was doing them, and whilst doing them as he was spotting me from behind I felt a VERY big bulge slightly brush up against my ass. Now, I've had experience with decently sized dicks, this though was something I've never even thought of as a size. I kind of pushed myself back a bit secretly and kept squatting to where his dick was brushing against my ass regularly now, and I know he knew what i wanted. So he decided it was time for a "break" so we headed back to the then empty bathrooms of the gym and I blew him and he fucked me in doggy. It was my first time with a BBC and well it probably was the best sexual experience I've ever had. It filled me with guilt but that guilt fueled lust, and I fucked so much probably for 30 minutes in that bathroom. Now this relationship has been going on for about 3-5 months now where I am constantly fucking my trainer behind my ignorant BF's back whilst he pays for it. Should I keep going with this experience?