When Thamara DeVries handed over the keys to her fully furnished home in Wheatley River, P.E.I., in February, she thought she was renting it to a family of four. 

But shortly after move-in day, DeVries was called to help with the property's hot tub. 

"I realized that there was a mom and a dad and 10 children, which is definitely not what we agreed on," DeVries told CBC News.

She said the couple confirmed the 10 children were all theirs and were all living in the house.

DeVries immediately contacted…