I do love the sequence of panels 3 and 4 in today's strip because it puts thousands of words into two pictures (including a very simple animated GIF). Basically, Faye starts to subconsciously reciprocate to Bubbles' massage and does so on what, for a human woman, would be a highly intimate area. At that moment, all the pieces slot into place and, yes, she suddenly realises that, as well as viewing Bubbles as one of her closest friends, she also is sexually attracted to her.
Her response in panel 5 is entirely understandable and I wouldn't be surprised if, looking back, Bubbles realises that there was a little fear in Faye's body language. I doubt Bubbles will realise this and I don't know if anyone will ever tell her but that's understandable. When you think how Faye was hurt by Sven and how tripping over one of the last hurdles with Angus nearly literally killed her, you can't blame her from being afraid of the intensity of what is happening between her and Bubbles.
So, I'm expecting that Faye is going to run through town to the library to talk to Marten. Because, whilst Dora is one of her best female friends, she's a bit too glib and relaxed about these things. Faye needs to talk to someone about what she should do next, not be advised to close the shop for the day and spend the time exploring things with Bubbles.
FWIW, coming up is a bit of self-conscious talk, first with Marten, then an equally self-conscious talk with Bubbles.