Do you think it ia control thing? You have taken control of the situation by kicking her out. Now she is trying to regain control over you by telling you that if you drink she will take the kids from you and that she is watching you.
I don't drink (much) but my W use to call me all the time and lecture me on how to deal with the kids (really stupid things too). I think it is them trying to maintain control and it makes them feel like good parents when they know they are not.
M35 W37 S9 D6 M12 yrs Know 15 yrs Bomb 1/28/07 My Sitch Failure is the opportunity to start again more intelligently - Henry Ford