Love?

I came home unexpectedly to pick up something, only to find that my roomate had Lethe on the table feeding her milk with a spoon. (The coffee cream milk)
Back track a few days. I came home to this really weird smell in the apartment. It turns out that Lethe pooped water. I was wondering how that can happen if the only thing we feed her is healthy cat food.

Having her on the table while doing that just add insult to it as it defies every rule I set. I do not want to spoil Lethe and she's doing exactly that because she needed it.

This is a hard situation for me as I understand the consequence of a too strict house rule. It is also a consequence of living with people. I have to be more tolerant. But is this right for Lethe? In the end, I am going to be the one who suffers the consequence of a spoilt cat.