With that, Karen went in for her massage. Erin greeted her with a kiss and my wife noticed she also smelled of pussy. Erin said "I see you know Beth" and Karen acknowledged that she did and, damn the confidentially, she wanted Erin to tell her about Beth's session as she got the first part of her massage. My wife laid down and, what became the routine, Erin started to remove her clothing. Karen noticed that Erin was barefoot and her black flats were tucked under the massage table. When Erin slipped off Karen's brown flats, she made a comment about my wife being up to no good today. Karen just smiled.
This time, Erin decided to strip my wife completely naked. As she massaged her, she was slowly covering her completely in oil and things were getting really slippery. My wife said she nearly had an orgasm when Erin went at her oily feet and toes. Erin told her she wanted to try a larger dildo attachment on the massager but needed to warm Karen up a bit before she could. Karen was intrigued and said "do what you need to". Erin's hands were slick, so she slipped most of her hand into my wife's pussy in one motion. Karen gasped and told her to keep going. Erin slid her hand all the way in and she was up against my wife's cervix. She massaged all around the inside of Karen's pussy and was gently stretching it as she did.
After about 10 minutes of this, Erin started to slide her other hand in alongside the first one. Karen gasped but her pussy was so slick and so loose from all the recent activities, it wasn't long before both of Erin's hands were inside and massaging her pussy. For some reason, Karen felt like having an orgasm but Erin was expertly keeping her on the brink instead. As she was doing this, she was describing how things went with Beth. Beth starting coming about two years ago and for about a year and a half, it was just regular massages for her. Beth often left with a very wet pussy just from the massage. Erin knew Beth would be a good candidate for the Hismith Servo treatment because she confided that sex had been painful for her for the last 20 years.
It took Erin a couple of months of suggesting it and telling Beth the research and trying to convince her that it wasn't cheating on her husband since it was a machine therapy. When Beth finally consented to it, the treatment totally blew her mind. She told Erin that she'd never felt that good in all her 63 years and wanted to continue with weekly treatments. Erin started her on the smallest 4.5" dildo with full speed and short 0.5" strokes and, in about five months, has worked up to the 10" long and 2.5" thick at full 6.5" strokes at 300 strokes/minute.
Karen asked Erin what settings she used on her and she was only on 3" strokes (the longest stroke it can do at 600/minute). She asked Karen if she wanted to try more depth or more width this time. Karen told her she wanted to try whatever Beth was doing before she moved to a larger dildo. Erin slowly withdrew her hands from my wife's pussy and slid the Hismith up to the table as Karen wiggled down to meet it. The entire 10" dildo slid in all the way quite easily. Before Erin started the machine, she reached down and pulled one of her own black flats off and put it under Karen's ass. The machine was at it's maximum extension, so Erin started it and set it on a nice and slow stroke speed. She then gradually increased the stroke until this massive rubber cock was plowing in and out a full 6.5". Karen was loving it.
My wife imagined this would be what's it liked to get fucked by a man's large cock. She was handling this pretty easily and enjoying it immensely. After her pussy was completely adjusted to this pace, Erin started to turn up the speed. When it reached its top speed, Karen was having orgasms but nowhere near as intense as the shorter strokes at higher speeds. Karen pushed against the machine and the dildo went deeper inside her. Karen beared down more causing the 6.5" stroke to penetrate her pussy with the full length. This sent her into a series of orgasms. Apparently, brutally high speed or deep penetration were her major orgasm triggers. Erin left Karen on the machine for about 1/2 hour. She then asked Karen if she wanted to switch things up and Karen screamed "God, yes". Erin began lowering the stroke length and increasing the speed. When it was at full speed, the dildo was penetrating Karen's pussy in 3-4" strokes and she started into her continuous orgasm.
Karen was nearly out of it having orgasms but she sensed someone else was in the room. At this point, she didn't care who else might be there. After about an hour of constant orgasms, Karen blacked out. When she woke up, Erin had cleaned her up and was gently massaging her pussy lips and clit. Erin then grabbed her black flat, with about 1/2" of Karen's pussy juice in it, and put it back on her bare foot. Then she picked up her other black flat and poured the juices out of it into both of Karen's brown flats. Karen asked her if that was also her juices but Erin told her it was Beth's. Karen stretched out her legs and begged Erin to put them on her. Karen finished getting dressed, thanked Erin for the wonderful massage and headed home. It made her really horny to know her feet were marinating in Beth's pussy juice as she drove.