I've just had my mum to stay and had an insight into the "it makes me look a little bit young and daring, who knew I could be so with it" mindset (she's 70). She loves per una-type stuff and also was going on about how great cotton traders are and how they do great jeans with a bit of stretch that would really suit me especially in the funky striped option
I found them online, here they are
I would rather wear no pants at all like eunice with the postie