Needing Her, Needing Him

A sequel to "Jack and Me... and His Lodger". Lucy and Angela are lovers and live together; Lucy has a bisexual orientation and Angela is a full-on lesbian. When Lucy meets Ross, an old boyfriend, she hankers to re-establish her close relationship with him. An opportunity arises that could enable her to have the best of both worlds, but it involves subterfuge, and deceiving Angela in a selfish move that threatens to undermine the foundations of their love. Lucy wants Ross for sex games; he is her willing submissive, and they plan regular meetings to have wild sex together, including pegging and light BDSM.
Ross is interested in a permanent relationship with her, but Lucy doesn't want to risk damaging her close bond with her lover. Can she ever persuade Angela to accept her need to continue seeing Ross? How is she going to achieve this, and still preserve the love that the two women have for each other.