Since you asked, I do think it is odd that your grandchildren sleep with you if you have other accommodation available for them. Also, a nine-year-old should be able to bathe or shower alone. I would worry more about lack of independence at that age than anything improper, but at age 9 I would expect a boy to be more modest than you are describing.
Free printable topographic map of Morro Bay (aka Moro Bay and Bernard's Bay) in San Luis Obispo County, CA including photos, elevation & GPS coordinates.
It serves as a trade center for the San Francisco Bay Area; its Port of Oakland is the busiest port for San Francisco Bay, all of Northern California, and fifth busiest in the United States. Incorporated in 1852, Oakland is the county seat of Alameda County.