It’s important to remember that Seaborn is simply a rapper on top of Matplotlib. This means that anything you could do it in Matplotlib can also be accomplished in this package. You just need to know which arguments. In the LM plot function, what you needs to do is pass the arguments for the wine and the dots separately. To pass the line, use line_KW a RT and then pass a dictionary of The arguments that you would have passed Matplotlib scatterplot.. Here is an example, changing the size of the dots, and their color.
If you wants to access the axis attributes, simply use The get axis command from the Seaborn facet grid object.