Carpe Demon by Julie Kenner
Kate Connor is your average, everyday mom with two kids, a husband, and one very big secret ... she used to be a Demon Hunter for a secret arm of the Vatican. Now retired, she's more interested in the domestic than the demonic. So when she catches sight of a demon in Wal-Mart, she tells herself it's some other Hunter's problem. But when that demon attacks her in her kitchen, retirement is no longer an option.
Now Kate has to kick a little demon butt, figure out why the creatures are trying to take her out and take over her home town, and at the same time take care of her 2 year old, deal with a hormonal 14 year old, get the family to Catholic mass on time, and try to keep her past a secret from her daughter and her husband.
She's a little out of practice, but hey ... if she can juggle two kids and an impromptu dinner party, ridding the town of demons should be a piece of cake. Like the saying goes, Carpe Demon ... and Kate intends to do just that.