Swenson's prolonged overthinking

Swenson had this plan to go computer city with Angela however he didn't necessarily want to disclose it to his wife Sherrie. As he was laying in bed he calculated his thoughts and found himself rather ashamed by the fact that that he de did not inform his wife and struggled to do same.  I realize how he pretended to be asleep when his wife got up and when she was leaving how he thought of rushing to tell her. He thought of all kind different sort of way how it would have affected his wife if she discovered that he went out with her. In my head I'm like if this man has to overthink so much why not just indicate to your wife of your plan for the day but I figure that the fundamental reason why he did not want to do this is because he did not want to raise any suspicion.