It does look like they're being drowned. Nice large drainage holes in the bottoms or around the bottom edge are needed.
When watering, water until moist, not *wet*. Once the plants are nice and large, (about 3 times their current size), then she can get away with making the soil wet between waterings because the plants will use the water much faster. Right now, she just needs to let it dry out. Don't trim off anything that isn't obviously dead.
On the next watering, just water with enough to get the soil damp. Then water more often with that amount.