I've had an internal debate on the Pool Girl about tagging it for MaleDom and BDSM content. There is certainly an element of power exchange present but it's not ... for lack of a better phrase, storybook BDSM. The power exchange between Melissa and Robert is casual, they don't have safewords, he's not (yet) wrapping her in rope. And while Melissa has strong submissive traits she is a challenging sub who likes to get his goat as readers have undoubtedly already noticed. As a sub she likes to play the brat, which is not her normal personality and isn't something she's fully aware she's doing. Robert has certainly noticed though.
My concern is that tagging it will imply a higher degree of BDSM content than is present which may increase in later chapters but probably not to a high degree. I don't want to mislead potential readers into thinking that this is a BDSM title, where in reality it's a romance with some power exchange.