'Devastated' Khloe Plans To Dump Tristan, Move In With Momager After Baby's Birth

Khloe Kardashian is absolutely "devastated" after Tristan Thompson was caught cheating on her with a mystery brunette — and she's ready to dump him for good!

"She thought she met the love of her life and was finally happy and then Tristan goes and makes a fool out of her," a source exclusively told RadarOnline.com.

"She feels sick inside, and her biggest dream has turned into her worst nightmare."

As RadarOnline.com readers know, the NBA star, 27, was caught making out with alleged mistress Lani Blair, in various shocking videos. On Saturday, April 7, eyewitnesses saw them locking lips at NYC hotspot PH-D! Later that night, they were pictured entering a hotel together!

The source told RadarOnline.com that Kardashian is "heartbroken and the family is worried sick that the stress will cause complications with the birth."

The 33-year-old beauty is expecting her first child with her sleazy basketball star boyfriend. She is set to give birth later this month!

Khloe wants to have the baby and move in with Kris for a while until she decides what to do," added the insider. "At this point she never wants to see his face again and does not want him near her when she gives birth."

As RadarOnline.com readers know, Thompson pulled the same cheating scheme on his last baby mama, Jordan Craig, when he started romancing Kardashian while Craig was still pregnant. He later dumped her for the reality star — only to treat Kardashian exactly the same!

Khloe Kardashian is extra sensitive to cheating, as she was humiliated by ex-husband Lamar Odom when he went on an infidelity and drug-abuse rampage during their marriage.