Meaning of と思う in this phrase


Context: Two girls are talking about something that happened to one of them
(something started to grow in her back) and her mother told her that it's
happening because her father is an angel. Her friend seems not to believe that
story and the girl responds this:

絶対噓だと思うよね。わたしも思う

I think she's saying here that, context here, what her mother said was a lie
and she also thinks that it was a lie. Or the と思う is being redundant and she
says she thinks that it was a lie.

I don't know if と思う is used for quotation apart from being used to express
what you think.




Without context, I would think the subject of the first 思う is people in
general, like “everyone” or “anyone”.

> 絶対噓だと思うよね。わたしも思う  
>  Anyone would think it is a lie, right? I think so, too.

