You're a spy, he's a hitman.

They had gotten married so they could continue their jobs without society treating them with suspicion and calling the police, but the other did not know who he was really married to. It wasn't a love marriage, just to convince myself that they got along well.

Now you were cooking while he cleaned the house.

"[Your name]! Can you tell me your favorite flowers? It's just... They asked me and I didn't know what to say..." He lied, the truth was that he wanted to give them to his fake wife, but he wasn't brave enough to say it out loud.