Kylie Jenner is CLEARLY the breadwinner in her relationship with Tyga — and now In Touch can exclusively reveal how much money she really spends on him.

Sources close to the situation explain that the lip kit mogul, 19, has spent "hundreds of thousands of dollars" on her rapper boyfriend, 26.

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"She's constantly bailing him out of debt, and it's gotten out of hand," says the insider.

The couple started dating two years ago when Kylie was only 17, after Tyga ended things with his ex-fiancée and baby mama, Blac Chyna.

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