Might as well go for the cum

Probably another 30 minutes had passed, and Heather leaned back for a break. The sense of claustrophobia had been coming and going in waves, and right now she was feeling **** for an escape.

John's description of the tubes makes sense, there seem to be no other options, so... why not just approach the problem head-on as it were. Besides, she suspected she could kill two, maybe three, birds with one stone.

"John... do you think you'd be able to cum like this? I mean, in this situation?"

John hesitated, then said, "I don't think I have much choice. It won't be easy, but you know us guys". It was a good thing she didn't have a monitor, or she would see the grin on his face.

"Ok... let's get the fuck out of here"

With that Heather reached up again, pulling her arms as far as the chains would let her, and took John's hardening cock into her mouth. She had not done this too often, but no one every complained. She rapidly bobbed her head, wrapping her tounge around his cock.

John was struggling between staring at his mother on the ball-cam monitor, and needing to lay back, close his eyes, and just enjoy. He'd never experienced this before and now his mother is going at it with gusto. Soon he could feel her spit dripping off his balls.

That thought had driven him to the brink of cumming when suddenly she stopped and released his cock. Perplexed, he looked at the monitor and saw her putting a mouthful of spit into the spit tube.

"Wow Mom. First, that was awesome. And smart move to make yourself spit more. But fuck, I was so close... please...," he trailed off, still not able to ask her to make him cum.

Nevertheless she repeated the pattern a few more times, using his cock to help **** her salivation. At least these times he was never quite as close, but this edging was driving him crazy.

She knew and returned to it. This time John watched her tits bounce as she drove her head up and down, and felt the cum so close. Without giving her warning he started to shoot into her mouth.

Heather stopped bobbing and became a passive receptical for her son's cum. Pump after pump filled her mouth. His taste was pungent and that combined with the guilt made her want to retch, but she held it together until he finished.

When he seemed to stop she dove forward onto the cum tube and spat it all out. Leaving back, she proudly stated, "I finished the spit tube, and a light on the floor came on. The cum one is over half full, so we only need to do that once more."

John looked at his mother in the monitor... her eyes watering, a little spit and cum still attached to her chin. She looked so good like this that he wanted more. He would get more.

"That was amazing Mom. Lets take a short break while I recover from that. Can you sleep that way?"

"I don't know baby. I'm exhausted too, I'll probably manage to cat nap somehow. I wish I had something to get the cum taste out of my mouth... although I guess I should be grateful the pee taste is gone."

"There is no water tube down there? I've got one here I can twist my head and drink from."

"Nothing for me. I guess that makes sense... if you couldn't pee we couldn't solve the puzzle"

"Yeah. Ummm, good night Mom"