gchat problems

Does anybody have *any* idea why the in-mail Gchat would abruptly stop showing my online presence to someone? I accidentally turned the stupid hangouts on the other day and when I turned it off, my mom couldn’t see me online anymore, and still can’t. This morning she tried sending me another invite to chat and it started not even letting her see my chats when I talked to her–it wouldn’t pop a window up.

Now I’ve turned the stupid hangouts back on and if I chat her, she can see it, but she stil...