she sounds like my cousin!
she was the first one to buy a betta, she did it out of impulse and he only had a bowl, and she would let the bowl get SO GROSS, there was film of muck on the top and all kinds of crap, it made me so mad! and either myself or me screaming at her to clean it would get her to do it, well her poor betta ended up getting sick. so she finally got a tank that was filtered, but the poor thing had fin rot and was just sick, and she still didnt care, and then i found out she just stop feeding it so it died. -_-
now she had a gorgeous HM tailed betta, and im CONSTANTLY down her throat about taking care of him. she got a 3 gallon tank and her got lil neons for his tank and theres all kinds of plants. it really does make me mad.
im no sure theres really much you can do, most people only see fish as fish. you could try talking to her parents about it.
my boy betta, beetlejuice.
and my girls, penelope and alexstrasza.
and the other animals.
lulu and tofu, the rats, rip tofu <3
lovey and geisha: cats, rip lovey<3