I am a bit disappointed about this because I really like the shop owner lady. She is so hot and lively. I wish she wasn't bogged down by her late husband's death because she is the definition of a MILF.
Wait, he's mad that he's a substitute? Bro, you were a substitute penis from the beginning. Don't get mad now. Sure, you can't replace her husband but you've ALSO got OTHER women. Besides, your just paying her back for taking care of you ... with your dick, LOL.
Doesn't read like he's mad, just that he's hurt. You can be upset about something without being upset at someone.
She was his first, and up until this point I guess he thought she had moved on from her husband's death and that she was kind of into him. This is the first time it's been explicitly spelled out that he's just a substitute for her dead husband, and no matter what kind of situation you have going on, that kind of thing is going to hurt a bit.