Here's a video of my EA Vixen on the automatic pumping system i've built.

I did this system to have a much more realistic feeling from the knot and the toy.
There's also an automatic cumshot system i've did so the cumtube will cum cumlube out from the tip of the toy at unexpected moment for extra realism


I'm also planning to upload a video about both system added together, for now it's just the automatic knot system i've did.

I can custom how it is done, so it can just pulsate a bit then inflate, cumshot inside me all the cumlube in the cup then deflate after 1 minute or whatever i set my system to.