Give her one chance.
Think about it and get to a condition where you feel comfortable.
Make up your mind for it and let her prove herself this time.
Only thing coming in my mind why she is worried abt that project, i am assuming she wont get a gud releasing letter or something related if she does that immd.
One more thing, if you decide to do that then pls don't make her feel that you are still doubting her or upset bcoz this will hurt you more thn her, first make your mind and heart peaceful then take some decision.
and only when you really get ready for it then say yes to her till then tell her that you badly hurt and need some time to think.