Ryuki looked away, and Fumiko was embarrassed as well to see his erection. She found that arousing, and more importantly, she wanted to touch it, but she controlled herself.
"Um... Mother... It's..." Ryuki appeared embarrassed and had a red face.
"Don't worry. It's normal if a woman touches it," Fumiko immediately said. She didn't want Ryuki to get embarrassed, and he might think it was bad and stop taking a bath together, something she didn't want to happen.
Fumiko washed his legs, and her eyes peeked at his erection, but she controlled and continued washing him.
After washing his legs and upper body, the only thing she didn't touch would be his cock.
Fumiko gulped and asked, "Do you want me to wash it?"
Ryuki's eyes shined, but he controlled himself, appeared as embarrassed, and shyly nodded to his mother.
Fumiko's mind was screaming, don't do it, don't do it, but...