We're not even really sure what to say here. There was almost no reason to post this on Reddit's AITA forum. Because, NO...you're 100% NOT the "A" and you need to file for divorce from this moron immediately!
Here's the short version:
Wife is taking care of kids & the home. Husband has an upcoming business trip and asks wife to pack his suitcase for him so he can go out and see his "guys". She says she is busy cooking, cleaning, helping with homework and he should stay home & pack for his trip. He enters the bedroom and she assumes he is packing. Then, he leaves the house.
When the husband returns, he is shocked that the wife didn't pack his things. She assumed he had. He misses his business trip because he left the house to hang out with his "guys".
It seems pretty obvious here that she is indeed, not the "A".
Check out the infuriating post here.