Hey summerblueskies,

thank you for coming here in support of your sibling! Bring supportive is the biggest thing you can do, and accepting their chosen name and pronouns is an important sign of support.

Has the tension existed in the family before they came out? Sometimes these can be different (although linked) issues.

Right now I think the best way of showing support is to use the preferred name and pronouns and maybe read up on the trans* nonbinary experience. I like Mikah's blog neutrois.me a lot, for example.