Aimee Louise Sword, the woman accused of tracking down and having sex with her long lost son, pleaded guilty in the case on Tuesday.
The Oakland Press reports that Sword, 36, accepted a plea deal for one count of first-degree criminal sexual conduct. She originally was charged with three counts of the same crime.
Police say Sword used the Internet in 2008 to find her biological son, whom she had given up for adoption more than 10 years before. The 16-year-old boy testified at a preliminary exam in January that Sword had sex with him in Grand Rapids and Waterford.
Child Protective Services notified detectives about the situation and Sword surrendered in April 2009.
Sword is expected to be sentenced on July 12, according to the Press.