EXCLUSIVE: Lamar Odom Bar Sighting Is 'Huge Slap' in Khloe Kardashian's Face, Source Says

Khloe Kardashian could "walk away for good this time" should Lamar Odom's drinking continue, a source tells ET.

Khloe Kardashian and Lamar Odom's complicated relationship has hit another bump in the road.

After Odom was recently spotted at a bar in Sherman Oaks, California, a source close to Kardashian tells ET there's a chance the 31-year-old reality TV star will "walk away for good" should Odom's drinking continue.

"He almost died -- if that's not enough to keep him sober, then what is?" the source says. "If Lamar makes this a habit, Khloe will walk away for good this time. Khloe is shocked that he was caught drinking again."

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"One thing is so clear -- Khloe would never get back with Lamar unless she knew 100 percent that he was maintaining his sobriety," the source stresses. "So him drinking again is a huge slap in her face."

According to TMZ, Odom ordered three Remy Martin drinks and paid for them himself at Johnny O'Brien pub on Saturday night. Odom was reportedly at the Irish bar with two male friends, and stayed for about an hour until around 1 a.m. on Sunday. The 36-year-old former NBA star later spent Easter with Kardashian and her family, and the source tells ET that Odom was perfectly fine at church that morning.

"Right now, everyone is wondering who took him there," the source says about Odom's bar sighting. "Khloe worked really hard to get all the enablers out of his life."

"He should not be consuming any alcohol right now, and was told that by his medical team," the source adds. "He’s still going to rehab treatments. He does a lot of cognitive rehab mostly. He still hasn’t fully gotten all his memories and motor skills back yet. He’s made incredible strides though, but he’s nowhere near where he was when they were married."

Meanwhile, it appears Kardashian is once again relying on her faith to get her through a trying time.

"I hate this feeling.... Helpless," Kardashian cryptically tweeted early Tuesday morning, hours after the report published.

But she also retweeted two of preacher Joel Osteen's inspirational messages, implying that she's not giving up hope.

"When something doesn't work out your way, it doesn't mean God has failed you. It means He's planning something better," Osteen writes.

"When you have faith despite how the situation looks, God will move heaven and earth to do what He promised," the second-retweeted message reads.

Odom and Kardashian are currently not together and do not have an intimate relationship, but are with each other often and "there is still a great love there," our source tells us. The onetime Los Angeles Lakers star is living close to Kardashian's Calabasas, California, home while he recovers from his hospitalization last October, when he was found unresponsive in a room at the Love Ranch brothel in Crystal, Nevada. Although the couple has split, Kardashian has continued to support him through his recovery.

Odom has had a history of substance abuse problems, which sources previously told ET was one of the factors that led to Kardashian filing for divorce in 2013. Last November, Kardashian opened up to ET at a Los Angeles signing for her book, Strong Looks Better Naked, and said she can "totally understand" what can lead people to addiction.

"When you are in pain and hurting elsewhere in life, you use certain substances to try to block out that pain," she said. "It’s really easy to do that and you think that's going to be your cure. [But] at the end of the day you have to address the problem at hand because the alcohol or the drugs is not going to take that problem away."

Kardashian also said that, in the past, she's turned to liquor to cope, telling ET that her issue "was more [with] alcohol."

The Kocktails With Khloe host talked about her complicated relationship with Odom last month on her FYI show, whom she's still technically married to.

"Just building a friendship back is what I'm doing now," she said. "It has nothing intimate, nothing at all. Just pure love, and I want someone to learn how to love themselves again."

"The best dream would be like, OK, I hope that first marriage could happen again, but it's really hard to erase everything that happened," she admitted.

Judging by social media, Odom appeared to have a great time celebrating Easter with his estranged wife and her famous family.

"God is good. Never lose your faith in him," Kardashian's older sister, Kourtney Kardashian, captioned a picture on Snapchat of herself with the friendly exes.

Odom was also captured showing off his dance moves in Kylie Jenner's Snapchat.

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Watch the video below for more on Odom's Easter celebration with the Kardashians.