Finished work and my colleague was picked up by her boyfriend. She is 20 and I am almost 28 but feel like she’s picking on me for some reason. Today, I was walking to my car. She passed in the car with her boyfriend, honked the horn and either did a middle finger or another rude hand gesture. I couldn’t quite see but it was something and her and her boyfriend fell about laughing. What would you do? We dont have the type of the relationship where that would be a joke either.