Perhaps the next stage adds the option of a Bluetooth link to a punishment unit in the chastity belt plug/dildo: I'm not in favour of promoting electrosex in the upper torso in the real world as it can affect the heart signals. Part of this is that what you're talking about is quite draining on battery power, you've missed the time element from your scenario, and the big drain on power is the shocker: the belt can take a larger battery pack offering longer use. The sensor could then live in the collar, and a second one could live in Tim's pocket!
An edit is also needed: is her guy Jim or Tim?