I wonder what would have happened had you not called her at all?
Does your son have a phone, and would he have taken the initiative to contact her?
The reason I ask is because one of my 180s is not nagging my H to remember things (he is very forgetful). This is difficult because the consequences can and do affect my daughter. However, because she is 14 and has a phone, if he is late to pick her up or forgets something, then she can call him (or call me if she can't get in touch with him). Then my H would have to deal with the consequences of having D upset with him. This is very hard for me to stand by and not intervene, but it is a growing opportunity for both of them, and it keeps me from looking like the nag/bad guy.
Just an idea -- but it really depends on your kids, if they have a phone, and if they are comfortable with that.
M: 43 H: 39 D: 14 Married 15 Together 16 BD: 6/2014 S: 8/2014 OW revealed 10/2014 Instigated dissolution 12/2014, in progress So over it!