Just back from a romantic getaway to Cabo San Lucas for her birthday, LeAnn Rimes and Eddie Cibrian continued to celebrate her 28th (which was actually on August 28) at TABU Ultra Lounge at MGM Grand Resort Casino Las Vegas last night.

An eyewitness reported to People that during their Mexican trip:

“On her birthday, LeAnn and Eddie shared a room service breakfast before heading to the beach,” a source says. The two also sipped fruity cocktails before heading to a private pool. “Eddie was very attentive to LeAnn,” the source says of the “lovey-dovey” duo.

Who knows, maybe these two will go the distance?

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Photos:  Judy Eddy/WENN