Khloe Kardashian has dropped her husband's last name from her Instagram account. Tumblr

Khloe Kardashian may not be saying anything publicly about her marriage to Lamar Odom, but she's evidently preparing to move on with her life. On Sunday, the reality TV star dropped Odom from her Instagram name, fueling rumors the couple is headed toward a divorce.

Her Instagram profile name was Khloe Kardashian Odom, but now its simply Khloe Kardashian on the popular social media site. Ironically, her bio states, "Love and Happiness." Odom hasn't been seen out with Kardashian as of late, and rumors have been continuing for the past few months that Odom has been cheating and indulging in substance abuse. Last month, he was arrested for allegedly driving under the influence.

Two women have said they were Odom's mistresses and had sexual relationships with the 33-year-old Los Angeles Clippers forward. Odom is reportedly living alone in a Calabasas, Calif., hotel while Kardashian stays at their mansion.

Polina Polonsky, 33, a lawyer in Sherman Oaks, Calif., told Star magazine that she was intimate with Odom for six weeks earlier this summer. She passed a polygraph test that backed her claims.

Prior to Polonsky, another woman, Jennifer Richardson, 29, told the magazine she had a tryst with the NBA player in January 2012 after meeting him at a Dallas strip club.

If 29-year-old Kardashian does split from Odom, he could lose a lot of money. When the couple married in 2009, they signed a prenup, which reportedly states that Kardashian would be owed about $500,000 for each year the pair was married, spousal support totaling $25,000 a month, $5,000 a month for shopping expenses and $1,000 for beauty care. In addition, their $500,000 Rolls Royce, a $140,000 Porsche Panamera, and Kardashian’s $850,000 engagement ring would be divided between them.

Kardashian is worth about $18 million, while Odom has earned a reported $56 million during his 14-year NBA career.