Yes, its true that Mbilia Bel used to be a dancer (she used to dance for Tshala Muana & Abeti, but wasn’t a Rocherrette. She joined Afrisa as a singer after that Tabu Ley discovered her, when she used to sing for Sam Mangwana. Tabu Ley recruited her because he wanted to promote a ypung female singer as star of his band. Mbilia Bel and Tabu hadn’t a son, they only one daugther who sung in Tabu Ley’s album Tempelo.
Her a career is to long to explain it in a few phrases. If you want to know more just watch her interviews on YouTube.