Maybe it could be Brooke's hot gay muscled stylist Ed helping her with her new lingerie line... but he starts noticing her son in the office... and one day coming to the house to work with Brooke... but finding RJ coming out of the shower... not wearing a towel even.
Picture Brooke finding them together and saying...
Brooke - RJ, what is going on here? (the left tear already starting to come)
RJ - Mom, nothing, we were just... I was just showing Eddie one of the wrestling poses I learned at the club...
Brooke - RJ, I know these things, honey, I've been pregnant 7 times. (the left tear comes out)
RJ - What do you mean, we were just... wrestling, that's all!
Brooke - I know what I saw. How is Luna going to take this? And what about your father! He will leave me if he find out... (because everything always has to be about her)