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.
San Diego Bay. San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S. â Mexico border. The bay, which is 12 miles long and 1 to 3 miles wide, is the third largest of the three large, protected natural bays on California's entire 840 miles long coastline.