Is there trouble in Playmate Paradise?

Kendra Wilkinson looked like a single woman as she celebrated her 28th birthday in Miami this week with a posse of female friends that partied until 3:30 a.m. -- and her husband, Hank Baskett was nowhere to be seen, Breaking Celebrity News is exclusively reporting.

After dinner at Katsuya on Wednesday night, Kendra and frequent party pals Jessica Hall and Jenny McCarthy's sister JoJo, rolled up to Mokai nightclub at 12:30 a.m.

Seated at a table stocked with a magnum of Moet & Chandon Champagne, two bottles of tequila and vodka, Kendra was spotted getting down, twerking on a banquette. (She joked earlier in the week on Twitter that she'd need a stretch session before attempting her X-rated moves.)

"Kendra was definitely having a great time hanging out and dancing," Jonathan Estallo, a promoter who hung out at Kendra's table, tells Breaking Celebrity News in an exclusive interview. And she didn't call it a night until 3:30 a.m.