變本加厲 is a must....see if you want to set her up and record her 'stealing' then call police then fire immediately.....or, you pretend you don't know it and just tell her one day that you don't need her and ask her to pack things, give her one month notice and all other compensation.....
My ex-bun was super good at all the cleaning and 'pretended' very nice....just 5 months then found out she stole our stuffs like crazy...you really can't imagine how many they can steal....when she washed clothes for us, if she found '$20', she would give us back...pretended to be nice but a big thief instead....so, if you tolerate her stealing habits, sooner or later u'll regret for why waiting for so long....for not sacking her out...