Disabled butterfly

Ella has been looking after Hannah's butterflies since they hatched. She has released them all but this one has a deformed wing and doesn't seem to be able to fly. She has been taking it out to the garden and putting it on flowers, but bringing it back in at night! Apparently tonight she's leaving it out, with flowers, sugar water and a shelter! I fear this is all going to end in tears but bless her for looking after it!