We've seen her twice - first time she was very mean to my daughter... BUT, we kinda asked for it. She had been doing a LOT of misbehaving the past couple days, just very defiant and we made a comment oh, this little girl has not been behaving. She gave her a little stern lecture, but oh, my then 5 year old was totally attentive listening to her - scared, perhaps?
My daughter had a bunch of M&M's on her dish she was sorting out into colors, and Stepmother would say don't play with candy while I am speaking to you. She told her she needed to be a good girl. My daughter said yes, that she would. Stepmother said no, you mean "yes, Ma'am". She then pointed to all the adults at the table and told my daughter - you see them? you do whatever they tell you to do. "yes, Ma'am", my daughter then replied.
Really, she was so in character - it was all quite hysterical!
Then came time for picture with her and my girls, and she looked at my daughter and said in this commanding, stern way "smile, you must put a smile on your face".... just funny in the picture, my daughter has this forced awkward half-scared, more intimidated than scared, smile.
Next time we went... had another family with us and sorry, but their daughter was VERY bad little girl. So said Stepmom would have to have a talk with her. But this time, Stepmother - hmmm, it's like she was a whole different person that day

, must have been in a better mood? Instead she was all sugary sweetness to her saying ohhhhh, I bet you really ARE a good girl, blah, blah, blah.
Bottom line - I think she can appear intimidating to some kids sometimes, but she isn't mean. Only reason she was "mean" to my daughter was our attempt to have someone set this misbehaving child straight - which thank you Stepmother, it worked!