WLNE-TV reports the attack happened Saturday morning in Central Falls, R.I.
Police say the victim was asleep with her son when a man broke into her home. The station reports the man pointed a gun at the woman's mouth, tied her up and raped her. The woman told the station her son saw "everything."
Police Capt. James Mendonca says the mother managed to get her son out of the bedroom and out of harm's way.
WLNE reports a suspect is under arrest.
Police did not immediately return a message from The Associated Press on Tuesday.
Information from: WLNE-TV