"Ari Up's mother, a strikingly beautiful German blonde, was a promoter and player on the London music scene; she was also a publishing heiress. As the girlfriend of the guitarist Chris Spedding, Nora Forster was privy to his production of the Sex Pistols' first demos in May 1976, and therefore to a rapidly unfurling new musical world; Spedding had already encouraged Ariane's efforts at learning the piano.
Nora left Spedding, and her homes became refuges for assorted punk musicians including Joe Strummer, who gave Ariane guitar lessons. "
"Her mother Nora Forster – who had long since split from her daughter's German crooner father – has been in a relationship with John Lydon since 1978, thereby making Johnny Rotten her stepfather"
http://www.independent.co.uk/news/obituaries/ari-up-rebellious-and-confrontational-singer-with-punkreggae-band-the-slits-2113240.html