(June 12, 1970 - 1974) (divorced) (2 children)

Mick Fleetwood recalled the beginning of their relationship in his book, My Life and Adventures in Fleetwood Mac: "I met Jenny when I was still in the Cheynes... I`d see Jenny coming home from school, a stunning 15-year-old in white stockings. I lost my heart to her immediately. I had a massive crush on her, but was so shy I couldn`t say anything to her. I knew then, at age 16, that this was the girl I was destined to marry."

Mick and Jenny's relationship was erratic for 15 years. They broke up first in the summer of 1966 while Jenny was working as a freelance model, "Well, I met someone in Rome and became involved. I told Mick when I got home and he got really upset. It was a very big breakup."

Jenny and Mick were married in June 12, 1970 at Kiln House; they had two children, Amy Rose (January 17, 1971) and Lucy (1973).

They moved to Los Angeles in 1974. As Fleetwood Mac became more popular, Jenny fell back on drinking and cocaine to help cope with the increasing social events and pressures. The constant touring of the band led to the failure of her marriage to Mick Fleetwood and her moving back to England for a few months to stay with her sister, Pattie, who was living with Eric Clapton. Jenny later moved back to Los Angeles, moved in with Mick, and they remarried in 1976. Fleetwood Mac became even more popular with the release of Rumours, leading to more stress between Mick and Jenny and an increase in drug and alcohol use. The couple divorced again six months after Jenny sobered up with the help of an Oriental acupuncturist.

She moved back England with her daughters in 1978.