Would you get mad from this girls?

Yesterday I was sittin on the porch with some friends and my gf and I took the fly-swather and smirked to my buddies then when my gf took a sip of beer I swathed a fly in her face. She couldnt take a joke tho and was screaming at me like a ****** and tried to kick me in the i had to swath her again now she says i will have to be on a dry spell for 5 weeks what does she mean?