I understand better now I think.

This is good place to come and let it all hang out, best part is, if you get triggered, you simply close the window until you feel better. Much safer than RL support group I would imagine.

Thing is, your new family members may or may not know in future. Maybe you cultivate strong relationships between you, and that leads to all or most of your family knowing, or maybe you guys don't become bosom buddies and its essentially a non-issue.

My point? Its too soon to let them in on it anyway, so don't stress about it and stop equating your privacy with hiding. This is what's causing you to feel fake, and fake is not a good feeling.