Everyone's had work-related revenge fantasies, but one Edmonton man is in hot water after making his a reality.

Kirby Christopher Sherick, 27, pleaded guilty Thursday to making his boss sick by putting peanut butter in her coffee, knowing she was allergic.

According to CBC Edmonton, Sherick and his boss, Jennifer Evans, were friendly when they first started to work together at the Millwoods Town Centre Safeway in 2010.

However, their relationship went south over the course of several months after Evans began to doubt Sherick after he repeatedly called in sick for work.

Working the overnight shift on May 13, 2011, Sherick went to get coffee for himself and Evans around 1 a.m. One of the coffees he laced with a packet of peanut butter, reports the Edmonton Journal.

Evans arrived at the Tim Hortons shortly after and Sherick gave her the coffee, claiming it was a peace offering.

“Sherick told Evans he felt bad they weren’t getting along and that he wanted to make amends by buying her a coffee,” Crown prosecutor Stephanie Brown told court Thursday.

She drank the coffee, reports the Journal, noting it had a strange flavour but not thinking much more until she began vomiting 90 minutes later.

Court heard Evans had made sure everyone on staff knew about her sensitivity to peanuts, reports the Edmonton Sun, and that she refused to handle jars of peanut butter or even go down the aisle where it is kept.

Sherick was caught several months later, after an acquaintance came forward and told one of Evan's co-workers he had seen Sherick mixing the noxious substance in her drink, reports CBC.

He pleaded guilty to administering a noxious substance and was sentenced to one year of probation and 150 hours of community service, reports the Journal. He is also under a court order to stay at least 300 feet from the Safeway store.

According to the Calgary Sun, in her victim impact statement Evans wrote, “what Kirby did broke my heart. It shook me to my very soul. Every time I think about it, it makes me so sad.

“I live in fear of him – it’s not fair.”

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