Too Many Wives. Charlie’s Circle Series, #5

This is novel 5 of the Charlie's Circle Series. Charlie looks like a man in his early 30s, but he is actually in his late 70s. He went through the regeneration process and thinks that his wife Doctor Janet Wilson enhanced his sexual drive and ability.  As CEO of Global Regenerations, Inc., he looks for beautiful brilliant women that are successful in their fields to work for his corporation. His young wives pick the women that they would like to see in their family and encourage him to get involved with them.
He and his wives live on a large ranch south of Tucson, Arizona in a Hacienda.  A large research facility is located on the ranch where they work and his wives hold key positions.  At first the corporation only dealt with human regeneration, but his wives brought new inventions with them, so the corporation keeps expanding into different areas of research. They work on projects such as a water creation machine that will transform the drier areas of the country.  His scientist wives bring practical inventions into his corporation which brings in lots of money.
All of his wives enjoy sex and are creative in seducing more sexual attention from him.  He is able to comply with their wishes and keep them sexually satisfied, but starts to worry that he is getting too many wives. Plural marriage in this series of novels is not religious and is legal in Arizona during the period of this novel. This romance novel is intended for mature readers and has explicit sexual scenes so is intended for mature audiences.