Blurred lines with my instructor

Hello all, I (30f) have been dancing with my instructor (70m) for the past 9 months. We dance multiple times a week but lately things have been feeling increasingly inappropriate. So I need a little insight from the community. About 6 months into my lessons another instructor happened to be at the studio and my instructor immediately asked for feedback on our dancing. (We were foxtrotting) straight away the guest instructor pulled my chest and head back away from my instructors and connected us “belly button to belly button.” A few weeks later in a different lesson my instructor made a comment about how “ever since Bob pulled my boobs off of his chest that day I can do blah blah blah better.”

It just rubbed me the wrong way. I felt like that was such an easy correction in our dancing that my very well trained and nationally recognized instructor should have corrected it a long time coming, but I also know that social foundations (he’s a historical top sales at Arthur Murray kind of guy btw) is usually not addressed at that level so I didn’t think anything about the correction until my instructor made that comment about my boobs.

My instructor will be flirty and I get it’s apart of the whole thing but he’s told me stories that push really uncomfortable boundaries. Like how the first lesson he taught he got a boner and asked the other instructor about what to do and the other instructor told him to not even worry about it and go teach.

He’s eluded to being turned on during our dancing when we first started to dance and has told me stories about how the old rich woman he used to teach at Arthur Murray loved his flirtatiousness because it was apart of the whole experience for them and they didn’t want my instructor to change.

He’ll send messages with heart eye emojis and winking kissy faces all the time. Recently he’s been talking about his sexless marriage more and more and relishing in his glory days of teaching. I’ve reconciled some of this banter down to my age just reminding me of that time in his life but now I’m not so sure.

And here’s the kicker. He’s teaching me at just the cost of the studio time so I can work with him and help him teach his wedding syllabus to wedding couples in exchange for the ballroom training. This was his solution to my ended our dancing after funding 20 private lessons and me telling him that it was the end of our dancing journey because I couldn’t afford the lessons… it made sense at the time but he definitely doesn’t need my help with this workload… I’ve taught maybe 2 lessons in the past 4 months that he was present for.

TLDR: my instructor might be grooming me a bit? Has tons multiple stories that push the bounds of appropriate, and sends personal messages about his days and life with a lot of heart eye and kissy face emojis. He teaches me to dance at no cost to him in exchange for teaching wedding choreography.

EDIT: To clarify!

He taught at Arther Murray for the majority of his dancing career and was wildly successful there and is now operating from an independent studio.