Is Gabby confused as to what she actually wants? She likes Lexy; even Emma noticed this. She 'loves' and wants to please Emma no matter what. Is it because it's a 3-way, well, sort of a 3-way? Has Gabby not thought that she would be used (fucked) and pleasure (by oral sex) another mistress, or even another sub? Did Gabby think that only Emma would fuck her and she would only service Emma? Yes, Gabby's naivety to what is expected of a sub, and toy, is showing.
Although it would be funny if Gabby really pleasured Lexy, I mean so much that Lexy would have a hard time walking afterwards, or pass out from orgasms! And why would this be funny? Because Emma would notice and be jealous, and Emma could not punish Gabby for it at all. :D