in regards to the violence against them... the one i usually roll with is
"if you keep this attitude up... you wont give me a choice... and i will totallyyyyyyyy have to spank the absolute shit out of you young lady! haha

"
i usually use that if they start getting fiesty/playful lol... it gets a laugh and gets them to think sexually about you lol... works for me... so maybe next time she gives you a bit of cheek... send her that lol... only if it is consistant with your personality... it suits mine perfectly
