"When my sister was on stage/killing it like a [expletive]/I was in rage/feeling it like a [expletive]," she sings in her new track, "Dirty Laundry." "Bird in a cafe/You'd never know what I was dealing with/Went our separate ways but I was happy she was killin' it."
"Bittersweet, she was up, I was down/No lie, I feel good for her but what do I do now?/"I was going through some [expletive]/Post-Survivor, she on fire/Who wanna hear my [expletive]."
Rowland also sings about her relationship with an abusive ex, who drove a wedge between the bandmates.
"I was battered/He hitting the window like it was me, until it shattered/He pulled me out and said, 'Don't nobody love you but me/Not your mama, not your daddy, and especially not Bey."
Fortunately, things are looking up for Rowland and Beyonce -- the pair reunited with fellow Destiny's Child singer Michelle Williams at the Superbowl in February, recording a new song and performing for the first time since the band broke up.
"Dirty Laundry" will appear on Rowland's upcoming album, "Talk a Good Game," out June 18.