Vicious girl’s armpits tickling

This blonde has very ticklish armpits. From tickling there she becames feisty and angry. A mixture of laughter and rage – that's nice combination.
She lies naked on a table and it all starts with feathers tickling of her armpits – she reacts strongly to such tickling.
Every minute will be more complicated. Her elbows are fixed too so that she can't not move them.
I'm beginning to tickle her armpits with my hands and sometimes she just goes crazy. I am also biting her and licking her body, causing her an unbearable tickling.
At the end she's asking to stop in a rage while I'm torturing her. I can not stop so fast…