Infestation: Bud McCracken and the War Against the Bugmen by Richard J. O'Brien
In Weyrd County, New Jersey, a UFO crashes into the Pinelands. Rumors soon spread throughout the county that the craft's occupants have escaped.
As panic spreads, Bud McCracken, pest exterminator, picks up a last-minute overtime assignment, and his client turns out to be his former grade school teacher Alice Cranberry. Bud soon discovers that the 'pest problem' at Alice's house is not of this world. Meanwhile, Alice picks up where she left off decades ago belittling Bud every chance she gets.
Bud knows there's only one way to deal with his childhood trauma. But Alice, under the aliens' telehypnotic spell, won't go without a fight.