No. The easiest thing for Q to do here is cooperate. He's the lowly chemist. She's the femme fatale kingpin. He made the stuff, but she
1. Found the market
2. Distributed it to various vendors.
3. Processed and laundered the profits, and
3. Made overtures to expand her business regionally (Yves and Sawyer).
He gets a deal for his testimony, she goes to prison, and everything she worked for disappears.
All of this was bolstered by Pearl's testimony. Why would she say such things about her own mother if they weren't true?