He does.

Matthew was surprised his mother would suggest such a thing, but then he supposed that she must have rationalized that they were just always nude around the house. He hesitated a moment, considering his erection, before deciding to strip. If anything happened, he could always just tell his mom she was having a dream or something. He took off his jacket and shirt, and his jeans and boxers, facing away from his mother. When he turned around, he noticed her glance at his naked body, her eyes lingering on his now full erection, before quickly looking away. He sat on a chair on the other side of the room, away from his mother as she turned on the TV. She seemed to be comfortable with nudity, but she still seemed to react with embarrassment to his erection. He supposed that hadn't changed yet. His heart was pounding as he watched his mother sprawl lazily on the couch, as the news played, totally uncaring that her son was also nude with a raging hard-on. It had only taken minutes, a few sentences, to get his gullible mother to this point. His mind raced with possibilities, but all he could focus on was his own lust. He needed to cum and soon.