Jenner, 59, spoke about her daughter's ex-boyfriend in the season finale of "Keeping Up with the Kardashians", reported Aceshowbiz.
"I think I've often made excuses for Scott and it's just getting tougher and tougher,' Kris said of Scott after she learned that he's cheating on her daughter Kourtney.
While Kris and her daughter Kim Kardashian were sitting in the kitchen, the pregnant reality TV star received a call from her cousin Cici Bussey who told them that Scott was pictured with a girl "with their arms around each other."
She called his action "disrespectful" to 36-year-old Kourtney.