Yukkuris have no rights. They had no right to complain over anything. This Marisa was anon's property. Property don't bark back at its owner. Only mistake anon did was that he took such a retarded property in the first place. Burn its feet first or something... but then again the story wouldn't exist. again, author makes his rules. If Marisa would have obeyed anon's orders then we would have gotten another family friendly boring story.
Why didn't anon keep Marisa in room like house house-cats or house-dogs? Simple. Author of this story wanted Marisa to get pregnant. And anons are always right.