To add to this, reverse cycle (aka heat pump) air conditioners will dehumidify the air during cooling operation as humidity in the air tends to condense on the (cold) indoor unit coil and leaves via the drain pipe.
These air conditioner units usually have the modes; cool, heat, fan only & dehumidify, which is why they arent just called ‘air coolers’ or ‘heaters’.

Doesn’t work on your mom though, still wet