Who is Dulcien from Down These Mean Streets and what is their importance?

Dulcien is the young woman with whom Piri has a sexual encounter at a party. She is a cousin of one of his friends and soon turns up pregnant. Although Piri appraoches Dulcien's family in the hopes he can help her and the baby.... to make things right, he also makes it very clear that he loves Trina and will not marry her.