Hannah Grice, a married mother of two, was also placed on the national sex offenders register for 10 years after pleading guilty to two counts of indecent assault on the boy, who was aged 14 and 15 at the time.
At a court in Cannock, central England, lawyers for the teenager - who cannot be named because he is a minor - said he developed a "schoolboy crush" on Grice in March 2003.
After a period of hugging and kissing, they progressed to having sex up to four times a week until May 2004.
"Prison's the best place for her," said the boy's mother, while Grice's husband, who works erratic shifts, cast doubt on what he called the schoolboy's "fantasies".
"What opportunity was there for three or four times a week?" he asked.
PS: Well..you never know.