I will renew the contract as it is very hard to find a helper not greedy and not stealing. Besides she can take care of 2 kids, not a lot of helpers are willing to take jobs with 2 kids. My helper demands own room and good meals from me. But she takes care of my kid well and willing to cook us dinner and do all the housework even after her day-off on Sunday. And she is flexible not taking day off when I need her to stay home.
If I were you, I will renew the contract and not take any risk. Honesty and kindness is more important than other things. Some BK mums can't find a reliable one to take care of the baby and keep on hiring and terminating helpers. They spend much more than paying the long service.