I dont have a Sister in real life but I know someone who I see as my sister and despite us been a million miles away, and sometimes dont speak or communicate for months and I believe years, I know she will always be there like a true sister KIRSTEN..
The beauty about Ursula is that she held up her part of the bargain, gave Ariel 3 days to kiss the Prince. Nowhere did Ursula say she could not interfere. It reflects how real life contracts work... Student loans for example.