A Portland woman was arrested in Bend on suspicion of prostitution Tuesday, according to Bend Police.Markita Roche, 21, was booked into the Deschutes County Jail after police said they discovered she had posted an escort ad on the website “Backpage" and engaged in sexual conduct for a fee. Police first responded to a suspicious circumstance report at the Marriott TownePlace Suites in Southwest Bend Sunday night.