<human>: Can you succinctly summarize the text in 1-3 sentences?

The actual TIFU happened about a week ago, but it came to a head today so it kind of still counts.  

My wife subscribes to an online clothing rental service that sends her fun clothes (that she picks out) every few days. She likes to try interesting/exciting looking shirts and dresses from time to time and the one she wore that day was similar to one that would be worn to a festival in the 60s or 70s. So later that day we were out and about and she asked me what I thought of the shirt and being the honest and loving husband I am, I told her it kind of had a hippie vibe to it. I should mention that she is very self conscious about her weight but she tries to hide it when she is offended, so the rest of the day she seemed a little put off.

Flash forward to today... we're chatting and I tell her a new dress she's wearing looks nice on her to which I get the response "well at least it doesn't make me look fat like the one from last week". Immediately my red flags were going up and I'm trying to figure out where that response came from, so I calmly ask what she means. "You know, the one that you said made my butt look big... it had a hippie vibe". I try to explain that I meant the 60s festival hippie vibe and that I've never heard somebody use the word "hippie" to mean big hips. She said ok... but this one isn't going away any time soon.
<bot>: Wife's shirt look like it would be worn to a hippie festival, she thought I meant that her hips looked fat... what can I say, I like a lady with a little extra booty :)