Reporting a small bug. Was trying to max out Lin's face sitting stat, and clicked her ropes outfit. It worked but now she only has "fun time" in her rope outfit, in every option. The only other one that works is nude, but the same issue of it being her only costume now is still there. Hope this helps and gets patched soon. Loving this game.
Edit: Don't know what I did but I guess the issue fixed itself. That, or it was limited to the cunnlings option and it fixed itself after an event.