I too come from an entirely cis family, of Irish Catholic background. While not practicing, and holding some fairly liberal theological positions, my mum's still a bit awkward on LGBT rights. While she accepts being LGBT as normal, she refuses to accept my bisexuality, calling it a "phase", and no doubt would call my being genderqueer a phase (despite me being in my mid-20s). She does know about my penchant for dressing in masculine clothes and says she doesn't like it, but she's not stopping me from doing it. And she's mostly stopped recently. I think it has a lot to do with my brother's girlfriend who, despite identifying primarily as female, also considers herself genderfluid. My brother recently brought up "Mx. E could be genderfluid" when my mum decided to ask why I like both masculine and feminine stuff when she thinks it's impossible. And you know what, he's kinda right. So I hope my family will become more accepting over time, particularly as I've ramped up the whole androgynous thing recently.