An aircraft seat assembly including multiple seats together having a total seating area. The aircraft seat assembly also includes an armrest separating a first seat of the multiple seats from a second seat of the multiple seats and a sliding mechanism coupled to the armrest. The sliding mechanism enables movement of the armrest to change a portion of the total seating area that is associated with at least one seat of the multiple seats. The aircraft seat assembly also includes a controller that controls movement of the armrest responsive to a control command.