Kimora Lee Simmons and Tim Leissner Kimora Lee Simmons and Tim Leissner

Good to see they still get along!

Kimora Lee Simmons' ex-husband Russell Simmons congratulated his former spouse Wednesday on Twitter, and revealed a big secret in the process. "All of us love @OfficialKimora but the fact is she is happily married," the hip-hop mogul tweeted on Wednesday. "Tim has been in the family for a while now."

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Simmons, 56, is referring to Goldman Sachs banker Tim Leissner, whom was spotted with Lee Simmons and her three children during a holiday getaway to St. Barts.

Lee Simmons, 38, has two daughters, Ming Lee Simmons and Aoki Lee Simmons, from her 11-year marriage to Simmons. She also has a son, Kenzo, with her former partner, Djimon Hounsou.

A former model, Lee Simmons most recently starred in her own Style reality series, Kimora: House of Fab.