Just don't marry her Jerry. Their mates lose their heads when they consummate.
That's a female that will be laying an egg case soon.
I caught a praying mantis with an abdomen like that, when I was a kid. I let it hang out in my windows and catch flys. It disappeared for a few days and showed back up looking really skinny. Months later, I got home from school and my mom was yelling and vacuuming thousands of baby preying mantises, with a shop vac, from my windows.
She had laid multiple egg cases attached to the clothes in my closet.
Keith