Phantasmagoria — Madelynne Ellis

In 1800, three years after escaping to London with her bisexual lovers, Bella Rushdale wakes one morning to find their delicate ménage à trois about to shatter. Vaughan, Marquis of Pennerley, has left abruptly and without any explanation. Determined to reclaim him and preserve their relationship, Bella pursues him to his family seat on the Welsh Borders, where she finds herself embroiled in his preparations for a diabolical gothic celebration on All Hallows Eve -- a phantasmagoria. Among the shadows and phantoms, Bella and her lovers will peel away the deceits and desires of past and future.