He loved the way she looked in her workout clothes. Maybe it was just the contrasts with her usual wardrobe: they showed a little more arm and shoulder, they tended to be a little more form fitting... But whatever the cause, the effect was clear: MAN it turned him on.
Sure, they worked out together a lot. But it was still a testament to his self-control (or more likely his respect for her wishes) that they ever got out the door without him trying to jump her. Living together, he saw her in underwear, in pajamas, heck, in nothing pretty regularly. But for some reason her gym clothes completely blew his circuits and took his mind to urgent, driving, sweaty places.
Speaking of sweaty places, they arrived at the gym without incident. Unusually for them, they were both pretty night shifted, so were taking advantage of the fact that this gym was open 24 hours. There were only half a dozen other night owls populating the well-lit maze of weight machines and cardio equipment. Our happy couple dropped their gear in their respective dressing rooms and got down to the serious business of lifting heavy things.
Normally the not-entirely-pleasant physical exertion (along with focus on form and an intense desire not to injure himself) kept him more focused on the workout than the way the stretch material highlighted rather than hid her maddening curves, the way her tops tended to show just glimpses of belly, the way the exercises tended to make her muscles ripple, bunch, lengthen, and relax... Tonight, for whatever reason, his focus never shifted. His awareness of her body (not to mention his intense desire to explore it) never faded.
In short, he wanted her. In a big way.
His vain attempts to keep his eyes off her had resulted in the occasional scan of the rest of the establishment. And though he seldom noticed other women when he was with his ladylove, in this case he happened to notice their absence. Of the 8 people still in the gym at this ungodly hour, all of them (including the desk staff) were male. His mind (which should have been counting to fifteen, or reminding him to keep his core tight or some nonsense) started to hatch a truly evil plan.
If she noticed that he was more distracted than usual, she kept it to herself. And, apart from a close call at the adductor machine, they finished their workout without incident and got to stretching. Over casual conversation, he tried to act as normal as he could while she spread her legs before him and folded her body into some rather... distracting configurations. Mustn't let her know anything was up.
Not yet at least.
They wiped their mats, put them away, and headed for the locker rooms. She took his hand and said, "Meet you up front in a couple minutes?"
"Sure sure" he replied, giving her hand a squeeze. She let go and headed into the women's locker room. God he loved that girl. And, he reflected as she turned the corner out of sight, he was pretty fond of that ass too.
It was with this thought fresh in his mind that he stood at the water fountain between the two entrances and, instead of going to his locker, pulled a couple of towels out of his gym bag and slowly counted to twenty. Then, without so much as a furtive glance, he strode into the women's locker room.