Wilton Police said they responded to complaints of commercial sex taking place in a relaxation spa by investigating the place and obtaining search warrants, resulting in the arrest of a middle-aged woman for prostitution.

Police said they had help from the Norwalk Police Department investigating the alleged sex activities at the In Spa, 7 Danbury Road.

The investigation culminated on the evening of Sept. 20 with the execution of search warrants at the business  and a connected vehicle.

As a result, He Lang, 43, of College Point, N.Y., was arrested and charged with prostitution.

She posted a $5,000 bond and will be arraigned in Norwalk Superior Court on Oct. 2.