A beloved nurse and mom of one was allegedly sexually assaulted and strangled by her ex-boyfriend at their Illinois home in an hours-long, recorded slaughter following a history of domestic assaults, according to reports and authorities.

Police responded to a home in the Chicago suburb of Schaumburg for a welfare check after a 911 caller reported not having heard from mom Katherine “Kat” Torbick, 43, throughout the day on April 30, according to the Schaumburg Police Department .

Kevin Motykie allegedly sexually assaulted and strangled Katherine Torbick at their Illinois home in an hours-long, recorded attack. Schaumberg Police

Officers — who were aware of a previous domestic violence incident between Torbick and her former longtime boyfriend, Kevin Motykie — forced their way into the couple’s home and discovered Torbick’s body, police said.

Motykie, 56, was found in the garage and arrested on an outstanding warrant for a domestic battery case involving Torbick.…