My mum never mentions it, just listens nicely. My dad does too, until I'm finding something particularly hard, at which point he interrupts and gives a whole "just relax, don't think about, let your me be free" speech. It's a annoying and wholly unhelpful. My twin brother is the worst though. When I'm talking to him and start stuttering, he just tries to brush me off, often with "get on with it" hand signs or sometimes just flat out telling me to shut up and going back to whatever he's doing.