I think I'd be intrigued to see the images myself, but would only worry about ruining the process, scratching etc. on the off chance the images had any value - sentimental or otherwise. Who knows what the images could have been? Cartier-Bressons perhaps? But what if they'd been something risque? I suppose the previous owner might have felt it prying, for the latter. If the woman was taking sentimental photographs of family members, or indeed doing something questionable with the camera, she would have taken the film out. Simple as. If she was just playing around with photography, she probably wasn't interested in the photos and therefore wasn't responsive to your courtesy. It's just another one of those social conundrums that photographers often find themselves in - curiosity vs the uptight. Don't worry about it.