in version 0.30 why can't i have sex on the living room chair for judy's?
Viewing post in World of Sex (v0.43 - Wendy's story) comments
There could be many reasons, you need to progress in Judy's story and go to Aquapark together and after you return talk to her "Let's talk about next steps in our relationship" then she will spawn in a different pose in the afternoon in home entrance sofa. There is a known bug, which will be fixed in 0.30.1 that the chance is lower (15%) than it should be (75%) for first ocurence.
Alternatively you can use skip content icon in main menu on the bottom right to jump to that moment where she is prepared spawned there if you want.