Why is my mum being nasty with the way she speaks to me ?

basically my mum is a carer to my dad who had a road accident three years ago and he cant walk unaided. i moved out of home at age of 18 and now married and have a lil girl aged 5months. i go and see my mum and dad when i can so they can spend time with there granddaughter. but when we go up my hubbys parents my mum gets funny she says she dont have a problem with them but has a problem with me and my hubby i have kept quiet for years and tried ignoring the way my mum is towards me but its getting to me lately even my hubby has been respectful and kept quiet but got to the stage of having to tell my mum how he feels . most of the time it feels as if my mum doesnt want to listen to any one else . the other day my mum said to me if it wasnt for my dad being here she would of jumped of a bridge by now , thn today i was told anything to do with your family you have no conscience at all goodbye, i dont know what i have done wrong getting me really down as im too scared to ask my mum for advice or say how i feel to her .