She's Taking Advantage of My Mother!

" She's taking advantage of my mother!"
" She's taking advantage of my mother!"
" She's taking advantage of my mother!"
" She's taking advantage of my mother!"
" She's taking advantage of my mother!"
" She's taking advantage of my mother!"

After hearing this over and over again for several minutes on our field trip bus ride I had to ask. What does it mean when a seven year old says," She's taking advantage of my mother!"? Stop tickling me. I should have known!