Actually it is widely believed that she is 30-50 years old, or more likely 30-34. I discovered this on a Reddit page that provided some very helpful answers which I ask you that you read, these answers have plenty of bits and pieces of evidence from the show that back this information up. The page is titled "What is Cyn's actual age?"
And on a side note, if you don't like seeing Cyn like this then I highly suggest that you keep away from it.