I think the issue here is precisely that we don't know what they're dancing, it's not associated with any major style of salsa, and they barely follow anything from any of the major styles of salsa to include Dile Que No/ Cross Body Lead; and as for my personal experience they also seem very confident in whatever it is that they're doing. Which by definition makes your advice to go to the flow and dance their dance not possible, since they appear to have crafted their own personal flow. The follow-up problem is that confidence. If they were humble and said they just dance with themselves and are not formally trained it's one thing, but with that confidence I'm afraid of just outright getting into an argument without getting to the bottom of why they dance that way and what I can do to improve our dance chemistry. The absolute worst answer to "Where did you learn to dance?" is "I'm Latina."