Anyone else doing the pickup/dropoff shuffle?

Mornings: me = dropoff guy. My commute starts later so I do 7:30am school run with my 2nd grader. Afternoons: wife does pickup because her job is flexible.

It's working surprisingly well but some days I'm running 20 mins late to work because of traffic/kid needs. My boss hasn't said anything yet but I'm worried it's noticed.

Does anyone else do this split arrangement? How do you handle it without jeopardizing your job?