Mycroft has a hard time fully expressing his love for Greg with words
Instead it’s the coffee on the DI’s desk first thing in the morning with the note, “Have a safe day. M” attached.
It’s when Greg doesn’t hit any stopped traffic on the way to or from a crime scene or even the pub.
It’s the home-cooked meal after a rough day, the smile that greets him at the door, the kiss and embrace, the domesticity neither of them had fully had in their lives.
They don’t need words to express their love. They just need each other.
Oh no this is cute