Getting Suspicious
After all that the pair had been through, John wasn’t ready to think the worst about his loved wife all because she was coming home late from work, which was turning out to be a regular thing now.
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It was only when he started noticing Donna acting distant and distracted towards him, did he truly realize that his paranoia was warranted. At first, he tried not to think about the possibility of Donna having an affair, but after a while, it all but seem obvious.