My girlfriend and I have been going to the gym together since we started going out three months ago. After going to the gym we very often had sex and Judy was always more enthusiastic than usual. I had not thought much about it until she said that she had an embarrassing story to tell me.
She told me that when she first joined she had arranged to have a session with a personal trainer. The personal trainer she had a session with was an attractive fit young female trainer. The session had gone well and the trainer said they would finish with some sit ups that involved the trainer holding Judy's feet. They agreed that three sets of forty would be completed.
During the first set when Judy had completed about twenty she became aware of being deeply sexually excited centered around her stomach. She didn't want to stop as she would have to explain why. As the set went on the arousal threatened to erupt into an orgasm but Judy managed to contain it by trying to use less effort.
Judy said the trainer seemed to recognize her arousal and asked her if she was okay to carry on. After the first set Judy was flushed and breathing heavily. The trainer told Judy to rest before the second set. While she lay on her back the trainer massaged both sides of Judy's lower stomach saying that she needed to relax. This only made things worse as Judy started to get moist between her legs.
On reflection she does not now understand why she didn't stop at this point. The second set was arousing from the beginning. Judy said that the arousal was not the same as during sex. It was far more general. She was frightened throughout the second set that she would orgasm but again fought to hold it off. By the end of the set she knew that she could not risk another set. Saying that she was feeling suddenly very sick, she accepted the trainer's offer of somewhere to take a rest before showering.
In a small private changing room she laid Judy on a treatment couch. Without asking she removed Judy's legging leaving her bottom half in just a wet thong. The trainer then placed her hands on each side of Judy's stomach and started digging her fingers in. Judy said this felt amazing, it was like having her pussy and bottom massaged at the same time. At this stage the trainer was telling her to let herself go as she knew what Judy needed.