Einstein gets a headache.

During a working, week, our habit is to sit down quietly for a while when we get home. Sometimes, it's on our own, sometimes we sit together and have a cup of tea and a chat on how our days have been. For me, this normally doesn't take long, as work in a warehouse doesn't lend itself to stimulating conversation. Julie works in a more dynamic environment and there's usually plenty to talk about; she's always busy and there's plenty of idiots to laugh/moan about.
One day, we sat in the lounge and Julie was rather subdued. Concerned, I asked if she was alright. She was fine, but it appears that she'd had something of a hectic day and was pretty knackered. Then again, as Julie put it....

Julie saw me giving her The Look and said, "What? That makes sense, doesn't it?"
No, love, I'm afraid it doesn't. I mean, I know Einstein said that time was relative, but I don't think he meant it that way...
Besides which, hasn't some clever set of scientists just proved that time travel is impossible? Spoilsports...