He passes out

Once they ate the sandwiches Adam went sit in the couch on the living room, being followed soon enough by Frank.

"Hey Frank, how long will your parents be out?" Adam turned on the T.V to get distracted from the burning need of getting his hands on Frank's cock and start pumping the shit out of it with his pussy.

"Not much, a few hours or so... hey was the mayonnaise expired or something? My stomach is Ah!..." Adam turned to face Frank, who was grabbing his stomach in pain and then pass out in the couch.