I know it is a difficult to be a single parent with 2 daughters. I don't know how old of you daughters actually...but you need to relax everything with yourself, otherwise they are only have bad feeling for their life and those are effect them for whole life. Do you want the results become to worst? Just go to this forum if you feeling bad, cos many single parents are willing to listen from you for sure.
sorry, I don't have chinese input right now as I'm not in home at the moment.