So far, one of the more mechanically satisfying porn games I've played. Combat, traversal, and your animation work are all well done. However, I especially admire how the lust meter and sex scenes are integrated in the gameplay loop.
I've mostly seen such mechanics implemented as a punishment, where excessive lust makes the player vulnerable to enemies, leading to a game over. The sex-as-recovery mechanic reminds me of the "Tower of Succubus" series, but there it was more freely available. By tying it to the lust meter, which increases through combat, you have created a nice loop of positive reinforcement. Good combat performance --> higher lust meter --> recovery + one enemy defeated. I only realised as I typed this, that this mechanic is essentially an execution move in more conventional games.
I look forward to your future developments