I have this colleague who is well known for being a bit of a bitch. Constantly slagging off other workers, then licking up to them at another stage, couldn't trust her at all. The other day I was driving to work and I overtook her on the dual carriageway, was probably doing 70 mph maybe a bit more but nothing too bad at all. Got to work and when we were in the kitchen she's talking really loudly that there are speed cameras and it's a good job she always drives within the limit etc. Totally for my benefit and I think to make me worry. Anyway 3 weeks have passed and still no ticket so I'm pretty sure she was lying and just a cow. AIBU here or do you think I'm overthinking it .