SSSdriver has a point. The slavers pairing Andy off with a mantis is probably their way of getting rid of a potential eyewitness without getting their hands dirty.
Remember, she is a slave, trained and brain washed by slave traders. She is conditionned to a key sentence and identify her "husband" as the first guy to say loud this sentence. She is maybe cute and all, but she's also a victim.
I just hope she is not conditionned to imprison her "husband" and feed him over and over if he dare to refund her, call the police or try something to free her from her condition...