no way. i worked at a psych clinic and knew some wonderful people who were bipolar. everything was great until it wasnt. and there is no warning most of the time. its a terrible illness, i feel for her. it sounds like she is functioning very well and is diligent about her meds, and im sure everything would be fine, but what if....? i know it isnt nice, but although she can make a wonderful friend, confidant, mommys helper, and just about anything else, there is no way i would leave my kid with her. be politically correct when it comes to just about anyone else but your babysitter. follow your instinct. you will see, being mama bear means that sometimes you have to be not-so-nice in order to protect your child. this wont be the last time. oprah recently did a great show about just that, they had these women who were victims of various crimes, all of which afterward spoke of the gut feelings or little signs that they ignored so as to spare someones feelings. she also had close calls who took action because of their gut, and later found out how they were almost, but not, the next victim. women do it all the time, we will get into an elevator with someone we dont trust so as not to hurt their feelings, talk to someone who makes us uncomfortable, etc....we are trained to be polite. i would rather be rude and safe, especially when it comes to my kids. say what you must to spare her feelings, but your child comes first.