After spending 15 min dragging until her right foot was visible in my first successful attempt, she woke up shortly afterwards from stroking her knee with the same speed as her tigh.
Getting more experienced leads to faster results, but doesn't change that starting from zero after the player invested quite some time and effort because of a single mistake is extremely demotivating.
The prospective to carry over key successes, like removing the blanket or shifting the arm out of the way, would make "bad endings" far less disheartening.
Remember, most of those starting this kind of game aren't here for a excruciatingly punishing challenge. If "patient masochists" are your target group, you should mention the game's character in the desription, so others stay clear or at least have been warned.
Different symbols for shifting and petting would also help to avoid confusion.