Ball inflation has the same problem in the current public build, and it's not just Ilinir, the horse exhibited the issue as well.
Also, any attempt to make his balls shrink when he cums fails..
Problem is Vridge (Riftcat) refuses to let me install it on my phone because it's an S4. And when I installed it manually from an APK, it crashed on startup.
VRStreamer doesn't appear to have SteamVR support though.