"Listen. One can only take so much," tweeted Tran, who has stuck with Brown for years through jail, probation, court dates and a Rihanna rebound.
"The best of luck to Chris and his family. No baby drama for me."
The 26-year-old's comment came Wednesday, the morning after TMZ reported Brown had fathered a baby girl, now allegedly 9 months old, with a former model and music-video performer named Nia. The "F.A.M.E" Grammy winner has known the 31-year-old baby mama for years, the website said.
Details about any formal or informal child support agreement were unknown, TMZ said.
And, ouch, TMZ tracked down a May 2013 photo showing Tran with her arm around Nia at a party in Las Vegas.
If the child's age is accurate, she would have been born last summer, right around the time Brown, 25, was sentenced to a year in jail for violating his Rihanna-assault probation with an altercation in Washington, D.C. With credit for time served behind bars and in rehab, he was out a few weeks later.
A rep for Brown did not immediately respond to a request for comment.