Bruce Jenner has formed a close friendship with Cher.
The 'Keeping Up with the Kardashians' star, who split from Kris Jenner in October after 22 years of marriage, has known the singer since the 70s but they recently began texting more and talking nonstop, and his estranged wife is jealous.
Bruce Jenner has reportedly been confiding in singer Cher following the breakdown of his marriage to Kris Jenner.
A source told InTouch Weekly magazine: "Cher has been a real confidante to Bruce about his marital problems with Kris.
Cher pals up with Bruce Jenner
"Kris hasn't completely given up on her marriage to Bruce yet, so she sees Cher as a threat.
"Kris believes that a Bruce-Cher romance is a very real possibility, and it really upsets her."
It was recently claimed Kris is desperate to win Bruce back, despite being the one who wanted to end their marriage.
A source said: "Kris can't stand living without Bruce, she never knew how much she needed him.
"Kris thought life would be so great when Bruce moved out, that she'd finally be free to date younger men and party. But she misses having him around. She wants him back.
"She tried to start dating, and that didn't work out. Now she's desperate to undo all the damage she's done."
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