Bianca met Mick Jagger at a party after a Rolling Stones concert in France in September 1970. On 12 May 1971, while she was four months pregnant, the couple married in a Roman Catholic ceremony in Saint-Tropez, France, and she became his first wife. The couple's only child, a daughter named Jade, was born on 21 October 1971, in Paris, France. In May 1978, she filed for divorce on the grounds of his adultery with model Jerry Hall. Bianca later said "My marriage ended on my wedding day."
During his marriage to De Macias, Jagger had an affair with then-Playboy model Bebe Buell from 1974 to 1976.
"The tears that have been on this shoulder from Jerry Hall, from Bianca, from Marianne, Chrissie Shrimpton… They’ve ruined so many shirts of mine. And they ask me what to do! How the hell do I know? I don’t fuck him! I had Jerry Hall come to me one day with this note from some other chick that was written backwards–really good code, Mick!–“I’ll be your mistress forever.” And all you had to do was hold it up to a mirror to read it. “Oh, what a bastard that guy is.” And I’m in the most unlikely role of consoler, “Uncle Keith.” It’s a side a lot of people don’t connect with me."
- Keith Richards on Mick Jagger and the women in his life