Quote Originally Posted by Kobold-Bard View Post
1. My memory fails me; was there an explanation for why the Dr's mum turned up to Wilf?

2. Be my guest.
I don't think we even know for sure that she was the Doctor's mother, canonically. Moffat has said that she was supposed to be, but the show itself hasn't offered any explanation about who she was, let alone why she showed up to Wilf. Nor why she was wearing a pantsuit.