"Paul: Yeah! She liked the attitude more than anything. She and Morrissey used to correspond quite a lot. I never really saw the letters, but they both sort of had similar attitudes about animal welfare. She was very punky in her attitude. We never got around to it, but she would have liked to have done something a bit more… [Paul impersonates a very aggressive punk track!] That kind of thing! She would have liked that, but we never got around to it, as I said."
Full interview containing the above quote:
https://www.paulmccartney.com/news-blogs/news/you-gave-me-the-answer-wide-prairie
Then cited here:
https://www.alternativenation.net/paul-mccartney-reveals-morrissey-did-to-wife/
Regards,
FWD.