I had a burd what had two kids many, many years ago. One day we took them to Bristol Zoo for the day (he was eight and she was about four) and it wasn't the easiest day I'd ever had. Anyhoo, that evening on the way home, I was driving and had just negotiated my way through the town traffic and onto the motorway. She was in the from with me and leant across to rest her head on my shoulder and said "it's been a hard day, hasn't it, babe". Before I had a chance to reply, the boy piped up from the back "oi you two, stop shagging in the car!"
Keep in mind that I was at 70mph, I burst out laughing and she whirled around to tear a strip off him. I laughed even harder at her screaming and his startled protests. She then turned to tear a strip off me for laughing, at which point I laughed even harder. Next, I find myself in the inside lane doing 30 mph before winding up stopped in the hard shoulder laughing so hard I felt sick.