Kylie Jenner has had it with transgender dad's in-your-face romance with much younger Sophia Hutchins.

A source close to the 68-year-old former Olympian tells Breaking Celebrity News exclusively Caitlyn can't stop gushing about Sophia Hutchins, and it's making Kylie sick.

"Cait couldn’t stop talking about Sophia, her beauty and how much she’s into fashion and makeup and even suggested to Kylie hire Sophia to work on her cosmetic lines," the source claims.

That's when Kylie let Cait have it!

"Kylie wasn’t hearing any of that and told Cait Sophia’s too young and only in the relationship for the money," the insider told Breaking Celebrity News exclusively. "Cait took offense to that and explained to Kylie that Sophia is the most honest, open and understanding women she’s ever been with in her life. Kylie took that as a diss to her mother and they dropped the subject.”

As Breaking Celebrity News previously reported, Caitlyn's been balling out on Sophia, blowing tons of cash keep her young girl toy dripping in the finest fashions money can buy.

"Caitlyn is spending an absolute fortune on Sophia,” another source told Breaking Celebrity News. “She’s constantly treating her to drinks and dinners at the nicest restaurants in town and buys her jewelry and handbags all the time!"

“This is costing Caitlyn at least $50,000 each week but she thinks nothing of this weird arrangement.”

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