LYNN – Lynn police made three prostitution-related arrests Wednesday night and even caught two people in the act, police said.Officers from the department’s Special Investigation Unit conducted surveillance near the corner of Union and Green streets at about 8:30 p.m. when Maria Santana, 37, of 38 Estes St., Lynn, allegedly approached a Nissan Maxima driven by Aldo Cassano, 31, of 132 Western Ave., Lynn, that had pulled over.Police grew suspicious because Santana has been arrested for prostitution before, including on Dec. 7, according to court records.Police say Santana got into Cassano’s car and they drove a few blocks to a parking lot at 95 Nahant St.Less than 10 minutes later police approached the vehicle and allegedly observed Santana performing oral sex on Cassano. Both were arrested and charged with committing an unnatural act.Cassano appeared at his arraignment Thursday at Lynn District Court, where a judge released him on personal recognizance. Santana never showed up to court and a warrant has been issued for her arrest.A third prostitution-related arrest was made at about 1:30 a.m. when Corinne Grover, 50, of 67 Tudor St., Lynn, was arrested and charged with soliciting sexual conduct for a fee.Police say Grover caught their attention because she was making eye contact with numerous vehicles that passed her as she stood in front of 172 Washington St.An undercover officer allegedly pulled up next to Grover and asked her where he could buy drugs, police said. In response, Grover allegedly asked the officer if he was interested in oral sex and he said “yeah.”Grover allegedly got into the car with the officer and they drove around looking for a place to perform the sexual act. During the ride, the two allegedly negotiated that she would be paid $30 for oral sex.When the pair reached Hamilton Street, the undercover officer identified himself as a police officer and informed Grover that she was under arrest.Grover appeared at her court arraignment Thursday and was released on personal recognizance. She and Cassano are due back in court in May.