Lydia's partner was shot in the stomach by a neighbour a few weeks ago. The neighbour and his wife were rowing and iirc he went round to invite them to come for a drink and a chat -socially, not in his cop capacity - and when the neighbour opened the door the neighbour, who was still rowing with his wife shot him.
Suarez was brought in as Lydia's partner even though she didn't want another partner, and there was a lot of friction between them. They are slowly adjusting to working together.
I like how they are adjusting to working with each other.
If I've got any of that wrong I'm sure somebody can correct it.