22-year-old Matthew Audet was arraigned on a murder charge Thursday.
Police say Audet strangled his mother debra last month.
Court papers show the two were drinking and fighting in their apartment the night of the murder.
The papers also say Debra Audet may have been sexually involved with her son for years, as well as her daughter-in law.
Bail was set at 100-thousand dollars cash and Audet was ordered to stay away from his wife.