Katie Price could be facing five years in jail after she was arrested on suspicion of breaching a restraining order.
Police were called to the former glamour model's home in Sussex on Friday after unconfirmed reports claimed that the 43-year-old sent a message to her ex-husband Kieran Hayler and his fiancee Michelle Penticost.
A spokeswoman for Sussex Police said: "At 5:45 pm on Friday (21 January) police responded to a report that a suspect had breached their restraining order.
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"Officers arrested a woman in her 40s who has been released under investigation while inquiries continue."
Katie was banned from contacting Ms Penticost in 2019 under the terms of a five-year restraining order.
She was fined hundreds of pounds after hurling a foul-mouthed "tirade of abuse" during a row in a school playground.
In December mother-of-five Katie was handed a 16-week suspended sentence and a two-year driving ban for drink-driving without insurance while she was disqualified.
Katie was married to Kieran from 2013 to 2018.
The couple had two children together, eight-year-old Jett and seven-year-old Bunny.
Next week the former Celebrity Big Brother winner will take fans into her home dubbed the 'Mucky Mansion' in a new Channel Four documentary series.
She will be seen renovating her 10-acre, 19-room property in the new show after it fell into disrepair.