Expandable lavatory and cabin configuration including dedicated seating area and expandable lavatory

An aircraft cabin, comprising:

• an interior space formed between a fuselage wall and a longitudinal aisle;
• an exit pathway leading to an exit door, the exit pathway dividing the interior space into a first portion and a second portion;
• a seating area positioned in the first portion of the interior space and including at least one passenger seat and a wheelchair securement area positioned to one side of the at least one passenger seat;
• and
• an expandable lavatory positioned in the second portion of the interior space;
• wherein the expandable lavatory comprises:
• first, second and third walls forming a lavatory interior, the first wall positioned across the interior space, the second wall positioned along the longitudinal aisle, and the third wall repositionable between a first position in which the third wall is positioned across the interior space and a second position in which the third wall is positioned along the longitudinal aisle;
• a first door positioned in the second wall, the first door providing access to the lavatory interior from the longitudinal aisle;
• and
• a second door pivotally attached to the third wall, the second door deployable across the interior space when the third wall is in the second position of the third wall, and the second door when deployed providing access to the lavatory interior from the exit pathway;
• wherein a footprint of the lavatory interior is greater when the third wall is in the second position of the third wall than in the first position of the third wall;
• and
• wherein the second door, when deployed across the interior space, is longitudinally aligned with the wheelchair securement area.