Matthew woke up with a shiver and a moan. Bethany's teasing finger on his nipple got its first reaction from Matthew's cock when it grew to hardness while she watched. Only then did his brain catch up, coming up from the depths of sleep to an awakening in full arousal.
"Morning Matty," Bethany said softly.
"Good morning Miss Bethany," Matthew replied softly as he fought back the remnants of sleep to awaken completely.
Laying naked in bed, Matthew was exposed for his pretty erotic tormentor. He always went to sleep covered in a sheet or light blanket, but Bethany's choice to keep the apartment warm enough for them both to be comfortable in the nude or sparsely attired just as regularly ensured that his nudity was fully exposed when he woke.
Bethany was wearing a bright red sports bra that held her lovely round breasts tight to her chest with matching cycling shorts that hugged her curves from waist to mid-thigh. Her face shone from the light layer of sweat she wore from her workout on the stationary cycle and her hair was in a loose braid that draped forward over one shoulder. Matthew could only admire how pretty she looked when she was flushed from physical activity and wore no make-up.
"It took you long enough to come around, I thought you'd never wake up. Did I interrupt a sexy dream?"
"I ... uh, ... don't remember," Matthew stumbled over his response.
Bethany laughed, her finger on Matthew's nipple never pausing in its teasing strokes.
"I bet," she said, "you were probably dreaming about sliding your kinky tongue between my pussy lips."
Matthew blushed at the image, his cock throbbed and bounced with an involuntary muscle spasm.
"Oh, look," Bethany said as she slid her hand down to scoop up the bead of precum, "your brain may not remember, but the little head never forgets."
Matthew opened his lips obediently as Bethany moved her finger over his mouth. Without a word he softly sucked Bethany's finger clean until it was pulled away.
Bethany smiled at Matthew's quiet acquiescence. Her fingertip continued to scoop up Matthew's seeping precum, alternating between feeding it to him and coating his nipple with the slippery liquid.
"No masturbating today, Matty," Bethany instructed in a calm voice, "I want you to use the big plug while you exercise this morning, and wear your cage for the day after you clean up."
"Yes, Miss Bethany," Matthew as his mind and body continued to respond to the teasing fingertip as it moved from cock to lips and nipple.
"Oh, one more thing," Bethany added as she held up the collar, "I am taking this for now. I am going to ask you later if you want to be formally collared, by me. You can give me your answer at that time."
"Yes ma'am," Matthew whispered.
"Good boy," Bethany said brightly.
Smiling, Bethany leaned down over Matthew. At first, he thought her lips were going to contact his own, but she redirected her movements when her face was inches from Matthew's. Turning slightly, Bethany brought her lips down to kiss Matthew's pre-cum covered nipple. Following that kiss with a swirl of her tongue around Matthew's nipple, Bethany spread her lips around the nipple until she caught it gently between her front teeth. Biting just hard enough to hear Matthew's soft moan, she released his nipple and sat up.
"Well," Bethany exclaimed, "things to do, and try not to be too distracted today Matty."
With that advice, Bethany was already heading out of the bedroom before Matthew could react.
A few hours later, Matthew sat at his desk, caged and plugged. Working out with the large plug stretching his bottom, and afterward going down to the medium size, the later plug was sufficiently comfortable that he gently rocked on it as he absentmindedly switched between reading stories on Literotica and watching short porn videos. More and more, his choices of both types of media matched the things that he did with Bethany or that she suggested he might like. Accompanying stories of men willingly submitting to chastity for their partners and videos of edging play and cum eating, Matthew found the combination of plug and cage to be an addictive drug on its own.
The routine they had settled into was a delicious cycle of stimulation and frustration for Matthew. Each morning he saw Bethany as they worked out, together or one after the other. When she placed the key on the counter with her empty coffee mug, the message was clear. Matthew was to wash the mug and any other dishes for her as usual, and then he could use the key to unlock his cock when he showered and shaved. Once the cage was locked in place again, the key was to be returned to Bethany or hung on her bedroom doorknob for her to find.
Matthew had become accustomed to wearing the medium-sized plug for his workout and morning coffee. After Bethany's suggestion that he should, he wore it occasionally, and then every day after she checked for it and found it missing once or twice. Those occasions were clearly identified as having disappointed her when Matthew was next over her lap for a maintenance spanking.
In the afternoons, once Matthew had completed his daily rounds of online job searches and sending of applications or resumes, he often wore the large plug for up to an hour at a time with breaks of similar length between sessions. In a short time, it also provided a comfortably filling sensation, one that his horny mind missed if he started browsing online without an inserted plug.
Bethany had been pleased when she discovered Matthew had advanced his training to regular use of the large plug. The first time she found him wearing it, she went to her bedroom and returned to show Matthew the bulbous black plug he had seen during their first video session.
"Are you ready to try this one yet, Matty," Bethany had asked with a mischievous smile curling the edges of her lips.
"I think I may be soon," Matthew replied quietly, his ass clenching slightly on the plug he was wearing as he recalled the strain and sensation of taking a new larger insertion.
"That's wonderful, we'll try it soon," Bethany said lightly as she carried it back to her room.