I'm pretty sure my mum would have told me if she had (mum likes talking about medical stuff) but my physio says that mine is particularly bad because my joints are hypermobile AND she says that can be genetic. But that could have come from my dad just as easily as it could have from my mum. I do remember mum being a bit obsessed with showing off how she could 'still' do handstands though when we were growing up, so she might be more bendy than most!