Context: The result of a spark of inspiration upon seeing a picture of Jamie in the black suit.
So This Is Love (Headcanon)
Jamie's black suit was cut from his body the night of the car accident. To this day, he's never been able to look at another one without tensing up.
After a particularly harsh day at work - which included a douchebag client in a black suit being rather rude while ordering a latte - Jamie hardly ate his dinner and went to take a shower with barely a word to his wife. Cathy, three months pregnant, followed him into the bathroom and shamelessly stripped down to join him. After protesting for a few minutes, Jamie gave in and allowed Cathy to wash his hair and give him a back rub, his anger ebbing away slowly.
They went to bed after that, curled against each other.