I recommend finding an older male teacher. You will learn a form of speaking that will win you greater respect, and unless you have an older man fetish too, hopefully it won’t get physical.
As for the current teacher, maybe work for a natural fade out. Get “too busy for lessons” for a few weeks and she’ll take the hint
Yeah I am not into older men and haven’t had a relationship with a man in many years (I am somewhere in the middle of the Kinsey scale). I have an older male Japanese tutor now, and it seems that I’m making faster progress now that I am no longer distracted by… certain assets the previous teacher had.
My previous tutor and I broke off our physical and teaching relationships some time ago, it was a mutual decision. In the end, this was just a bad decision that was more trouble than it was worth.
Plus, as @MikeH pointed out, It’s likely better to learn from a guy to avoid sounding super effeminate.