You've done the first level up event with someone, right? After you do that, you unlock the Appearance tab on the sidebar. In that tab, does it say "Your skin is as smooth as you are as cute"? That's how you make sure you have the Cute setting properly unlocked.
I don't know what to tell you. To check, I just started an entirely new game on the Patreon version and played through everything to get the requirements I listed and then I got the Leon Park event and it worked fine. So long as you don't pick the options that end the conversation, you can eventually ask "Something wrong?" and then that leads into the sex scene.