There is a lot of good advice on this thread.
But I think before you try any of it ask her in a casual way why she does not come in when DBF is there. If she just shrugs tell her it is ok to tell you why. If it is because she just does not like him tell her you will never tell him.
If she is fine with DBF ask if everything is ok at school. Tell her you really need to know what is wrong.
But I think before you try any of it ask her in a casual way why she does not come in when DBF is there. If she just shrugs tell her it is ok to tell you why. If it is because she just does not like him tell her you will never tell him.
If she is fine with DBF ask if everything is ok at school. Tell her you really need to know what is wrong.