Well, my suggestion wasn't actually to make her stop, sit down face to face and tell her how she sexually disappointed you with her handjob skills. You may not even have to tell her how it's wrong if you can tell her when she does it right. I mean, you could just drop a gentle hint while she's doing it like "oh yeah, just like that" when you think she's got it right.
.. Or don't and just keep faking enjoyment while being molested.
