Stop in for a cup of coffee

Funny last time she worked from home she tells me "when I go back to work (home office), I'm working so you can't come back there bugging me all the time"
I replied "ok, remember during the day when you are at work I'm not use to telling anyone where I'm going, or when I'll be back" She frowned but agreed.
Day 2 I'm leaving and asked her if she wanted me to lock the front door. She asks 'where are you going' to which I replied 'aren't you at work'.
Our agreement worked well.