Both parent Sims autonomously cancel the feed infant interaction if it is queued up.
I also just a frustrating scenario - I had the mother Sim potty-training a toddler Sim downstairs (and in her action queue there was an action to "repair sink" after) and the father Sim, who was upstairs queued up to "bottlefeed infant", continuously inserted "hand infant Sim to mother Sim" into the first spot of his action queue (he auto-cancelled "bottlefeed infant" after handing the infant Sim away). I cancelled the action three times and the walk action but the father Sim still handed the infant Sim to the mother Sim while she was skill-building with another child. The mother Sim then set the infant Sim down in the downstairs hallway and abandoned potty-training her toddler Sim.
