This is Lleyton Hewitt's sister Jaslyn. Obviously being some sort of body builder she's significantly more intimidating than any of the nancy boys on the ATP Tour, but on the women's side of things she'd just be another face. The wily Mottram brothers at Mister Irrelevant couldn't help but noticing the daggers coming out of her eyes or the muscles peaking out of her shirt during Lleyton's recent match. After the jump is a rather fantastic video of the fairer scarier Hewitt sibling via FanIQ...
Sexy Update: After the jump!

UPDATE: The Mottram's now provide us with new photo goodness from Jaclyn's past... as a model!