I have the same problem with my GF. She’s 5’2″ and I’ve been on about raising her saddle for ages. She’s finally coming round since I showed her how to dismount/tip the bike to swing her leg over.
Unfortunately, her confidence/balance issues stem for weakness on her right side as a result of having a stroke years ago. I bought her a Rock Lobster Team Tig which seems about the right size, but we’re having all sorts of issues getting her saddle right, as she can’t articulate quite what the issue is.
We’ve managed to eradicate the ‘fanny mashing’ by adjusting the angle very slightly nose down, but she still feels like she has to push herself back to avoid resting on the nose of the saddle. I’m quite sure we’ve not yet hit the right fore/aft position, but I’m starting to wonder if the bars I put on are too wide for her, pulling her forward. Reckon next ride out I’ll stick some On-One Mary’s on for her, given her right wrist could do with a little more support.
Sorry for the slight hijack.