In Den of Thieves Nick went to a club and went to a hotel with a woman, who I think has a relationship with Merrimen. The next morning Merrimen randomly walks in on them, the woman flees, they stare each other down, then Merrimen leaves.
Afterwards, Merrimen's...wife? says "I did what you told me to". What did she do, just get his number so Merrimen could call him while he was robbing the bank?
Bonus question: Did Nick know the woman was related to Merrimen since he saw her at the hibachi restaurant with them?