That winter, she joined the Los Angeles cast of Hair, the musical. Eventually, she was to meet Pam Sawyer, who asked her to write for Motown Records. Jones and Sawyer were amongst the second string of writers at Motown, but still wrote for such artists as Gladys Knight & the Pips, Commodores, The Four Tops and The Jackson 5. As Jones was also initially a singer for the label, protocol demanded a pseudonym, so for some of her co-writes she used the name LaVerne Ware (not to be confused with another Motown songwriter/producer, Leon Ware). Songs that Jones worked on during this period include The Supremes' "Have I Lost You" (writer), Marvin Gaye and Diana Ross's "My Mistake (Was to Love You)" (writer), Junior Walker's "I Ain't Goin' Nowhere" (writer/producer) and the Four Tops' "Just Seven Numbers (Can Straighten Out My Life)" (writer). In 1970 she provided backing vocals on Ry Cooder's eponymous first album. The best-known song that Jones penned was Gladys Knight and the Pips' "If I Were Your Woman", which was nominated for a Grammy in 1971. Jones left Motown at the end of 1973, following the release of her album Share My Love. After Motown Jones first met Marc Bolan of T. Rex in 1969 while performing in Hair (Los Angeles cast). While touring in Europe, Bolan and Jones met for the second time at the Speakeasy in London. In 1972, she was recommended by Warner Brothers' Bob Regehr to sing backing vocals behind T. Rex at Winterland in San Francisco. Soon after joining T. Rex, Jones and Bolan became romantically involved. They had a son, Rolan Bolan (b. September 26, 1975). She sang backing vocals and played clavinet with T. Rex from 1973 to 1977. Her rendition of "Dock of the Bay" appears as a bonus track on T. Rex's album Bolan's Zip Gun. Jones released an album in 1976, called Vixen, which featured several songs written by Bolan, and he also was the producer for the album. In 1977, Jones worked with the group Gonzalez, producing several of their singles, and also penning the disco hit, "Haven't Stopped Dancing Yet" for the group. She toured the UK with Gonzalez, first on the Bob Marley tour, and then with Osibisa. She was the driver of the car, a Mini 1275 GT, that crashed near Barnes Common, striking a tree and killing Bolan at 4 a.m.