is there any sex animation in the free version or you have to buy the game to see sex scenes?
1. Have you noticed the "Watch Further" button? Each screen has three "yellow dots" (". . .") next to it when a scene can be "Watched further", and pressing on that or using the hotkey (see "How to play notebook" in the game) will progress the scene further.
2. If you do know about the watch further, then have you made sure you unlocked the "spicey scenes" in the progression as well as waited for them to appear where they should? (Again, use the ". . ." as an indication that this scene you are watching has more to it)
Let me know if this didnt help.