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Without her boyfriend Tony Romo in sight, Jessica Simpson enjoyed some poolside tanning and lounging with her girls. That might lend credence to the rumor that Jessica’s father, Joe Simpson, is working on breaking up the couple.

Jessica’s mother, Tina Simpson, and girlfriends of the singer accompanied her on a vacation to Mexico. The only gal missing from the gang appears to be her sister Ashlee Simpson, who’s got her hands full with her baby boy.

The curvaceous pop star flaunted her curves in a bikini, while laying out to tan. Any weight gain concerns seemed to be hundreds of miles away as she oiled herself up and let the sun do its job. That’s the thing about abs. You can always just paint them on, if you really want them.

Gallery Info: Jessica Simpson hangs out with girlfriends and her mom Tina in Mexico.