The pair's fling ended last week with Jasmine branding Lee a "screw up" who needed to spend a year in rehab.
The US model told The Sun: "Being in a relationship with him was emotionally draining. I couldn’t get a word in edgeways as he talked about how his career was on the rise.
“Lee genuinely thinks Blue are No1 in the charts, are as big as One Direction and he has the appeal of Harry Styles.
“He cannot accept his career is going nowhere. It is tearing him apart and he needs to get help.”
Taking to Twitter this week, Jasmine however claimed the "real reason" for the split was Lee cheating on her... with another bloke.
"the minute I got home to LA, he cheated on me with a MAN! #admitUgay" she tweeted. “Wish this was a joke. Living a lie and dragging other ppl into your life is selfish and disgusting.. #bereal#manup.”
A spokesperson for Lee told The Sun newspaper: “We will not be commenting on the absurd claims made today."
They added: "We wish Jasmine the best in her future endeavours.”