Bump Time Terminus - Doug J. Cooper - Bog

"Rose Lagerford and her "sisters," duplicates of herself from parallel timelines, love spending time together in Bliss, a virtual world where anything they imagine can come true. Their private world is maintained by Luca, the devoted family AI who satisfies their every whim. Rose couldn't be happier. That is, until she discovers that she and her sistes are being manipulated by Luca to uncertain ends. Alarmed by the situation, she works to derail his control. But in a world where reality seemingly rewrites itself moment by moment, who can divine what is real, and what to do next? Just as her efforts gain traction, Luca discovers the plot, and his hostile reponse threatens them all. Can Rose overcome her fears and escape his domination? And can she learn his secret in time to save not only her own life but the lives of her sisters?"--Provided by publisher.