Reality TV mom KRIS JENNER is banking millions as manager to her Kardashian daughters – and now she wants to cash in on stepson BRODY JENNER and his girlfriend, pop singer AVRIL LAVIGNE!

Kris – who manages the careers of her six children – is trying to convince hubby Bruce Jenner’s son, Brody, 28, and Avril, 27, to appear on “Keeping Up with the Kardashians” in order to boost the show’s ratings.

But what she really wants, say insiders, is to take over their careers completely!

“Kris is always trying to come up with ideas to make the Kar­dashian empire even bigger,” said a family insider.

 “She knows the show got some flak for being boring last season, so her new plan to spice it up is to get Brody and Avril to make appearances on it. Her ultimate goal is to take over as their manager. Kris sees nothing but dollar signs in Avril.”

Kris is slowly elbowing her way into Avril’s business empire, which has an estimated net worth of $45 million.

In Septem­ber, she helped her 14-year-old daughter Kylie land a gig model­ing Avril’s Abbey Dawn line at New York’s Fashion Week.

But the rest of the family is pushing back at Kris’ efforts to manage Brody and Avril.

“Kris takes home 10 percent of her children’s salaries, and they constantly make snide comments about her only being concerned about her cut,” added the friend.

“But if Kris can become Avril’s manager, she’ll be laughing all the way to the bank.”