Khloé Kardashian Odom and Lamar Odom
Splash News Online; AKM-GSI
08/23/2013 at 01:00 PM EDT
Sure workouts are hard, but Khloé Kardashian Odom
looked more miserable than most at the gym this week – and doing so sans wedding ring just fueled the ongoing rumors about her marriage.
Kardashian Odom and husband Lamar Odom haven't been spotted together since June 2, and have not addressed divorce reports following tabloid accusations that the basketball pro cheated (He denies those claims
"She didn't smile at all and seemed miserable," says a source of the reality star, who was spotted leaving an Equinox gym in Woodland Hills on Thursday. (Kardashian Odom has generally appeared to wear her rings to the gym in the past.) "She seemed like she had a lot on her mind."
While Odom, 32, has recently been spotted at hotels close to his Tarzana home he shares with Kardashian Odom, 29, a source insists that the reality starlet is "very loyal" to her husband of nearly four years
and explains that the NBA star stays at a hotel when his wife shoots her family's reality show, Keeping Up with the Kardashians
In the weeks since the infidelity allegations
first emerged July 10, Kardashian Odom has continued to post happy pictures of the couple to her Instagram account
with the latest on August 15, a side by side shot of their shoes with the caption, "They look so small compared to his."
And despite plans to renew their vows for their anniversary this fall, a source says, "It's difficult for Khloé that people are questioning her marriage, but she's strong and Lamar is her world."