GVH-874 · Incest: Yui Mamiya

Recently, Yui's nipples have been swelling for some reason, and their sensitivity has increased. Although the hospital diagnosed her with no abnormalities, she decides to inform her son just in case and shows him her enlarged nipples.
"Don't stare, it's embarrassing..." When her plump, reddish nipples were exposed before his eyes, lewd thoughts raced through her son's mind.

"I can't believe Mom's nipples are that erotic..."

To help the troubled Yui, her son offers to give her a nipple massage. But as expected, the nipple stimulation makes Yui climax intensely!
Seeing Yui's disheveled state of orgasm right in front of him, the son's arousal doesn't subside, and the two open the door to forbidden incest...