Definitely check your mods. ForceFuck mod for example is broken, and doing actions like "tease" causes the action of the NPC to seemingly be ignored despite displaying the flavor text of what they tried to do in the main window.
For example, if the NPC chooses to do (the player-equivalent of) Fuck::Anal when I clicked "Tease," it might say "NPC moves around behind you and starts grinding on your backdoor," but they are still just sitting there staring at me - we don't actually enter the Fuck::Anal state.
Your issue sounds kind of similar to that. Definitely do some troubleshooting on your end, first. Also, make sure it is fully updated - latest is 0.1.8fix3. I vaguely recall one of the recent fixes having something to do with that.