They hadn't specifically discussed being monogamous but the truth was, Arthur had no urge to be with anyone else. Ever since they decided to do this and pursue this further after the job, Arthur was committed to it.

His mouth curled up reading the responding text before he shot another back to him.

Good - I think I'd like to see that.

As far as he was concerned, and he knew it wasn't one sided, Eames was his just as he was Eames'.

Before I come down, should I bring anything with me? Special tea or speciality packaged food?

Yeah, he was thinking ahead.