I'm pretty sure it's AI generated; which is really weird because I'm pretty sure there are plenty of 50's era images featuring a smiling woman in the kitchen.
Yeah, I was going to say. Even without the usual tells I just could feel that it seemed AI. It's that glossiness I think; even with a filter over top of it it looks off.
For me it's the waist. It's really thin, which would be ok for a 60's illustration but the contour of her dress doesn't match before and after the forearm.
0 reverse image search results. the fucked up shadows and broken waist/skirt are what confirm it as AI for me—not even the most lazy human artist who can render this well would draw those so poorly.