Not the trait I was looking for

I've heard that people who are together for a long time start to pick up each other's traits

Earlier, Kris told me he'd be heading home in 15 minutes. That would put him home 45 minutes later, given his 30 minute commute even in the carpool lane during rush hour. It's 90 minutes later and he still isn't home yet.

Now, lateness is supposed to be my trait, not his.

I'm not so sure I want him picking up ALL of my habits, much less this one.