Look, I really can't say that was the Marisa's fault. They move by either wiggling or hopping, eventually, she's going to orgasm from what has to be near constant stimulation for several days. Plus, it was only twice more, judging by the number of stalks.
Seeing as her peni-peni is still attached while she's slide-sliding around, I don't think she was lying. Her face at the end is just a result of inadvertent refreshing for several days straight. She can't help but enjoy it.