My supervisor is badmouthing me front of her colleagues and it's really disturbing me.

She's even blamed me for not coming to supervision where as a meter a fact, we normally do it via skype. She even CCd the secondary supervisor that I haven't come to any meetings whatsoever throughout the term! The ridiculous thing here, I was helping the supervisor with her other project (which is unrelated to my work at all), so that's why we didn't have any meetings together with the secondary supervisor.

I've raised the matter with the secondary supervisor and according to him, the first supervisor is busy so that's why she's behaving like that.
It seems from here that he's more interested to protect her well being (theirs?) instead of mine.

Help. What should I do? : (