Dance teacher Amber Telford, 33, romped with the 17-year-old student in her studio as well as in her car and at her mum's house.
But the illicit affair was uncovered when a private detective hired by her estranged husband caught the pair together at the dance studio.
The pair were said to have been found under a blanket with their clothes 'strewn all over the floor'.
Police in Taylorsville, Utah, arrested Telford - a former NBA cheerleader with Utah Jazz - and she has now been jailed for 30 days after pleading guilty to unlawful sexual activity with a minor.
Local news station KSL said in exchange for her plea, prosecutors agreed to dismiss six other identical charges.
A court document stated the pair began flirting together before the relationship developed as she bought him clothes and paid for him to go to Disneyland for a dance competition.
It said: "She started by flirting with (the teen) and eventually began a sexual relationship with him that occurred at her home, her mother's home and also in a vehicle belonging to Amber."
The report also claims Telford would pick the boy up for in the middle of the night and drive him to various locations for sex.
The court also ordered her to perform 150 hours of community service, complete probation and register as a sex offender.
The affair was discovered late November, around two months after Telford had filed for divorce from her husband.
The studio - Colette's Dancing School - is no longer in operation. The business is now run by different management under a new name.
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