Natasha Bedingfield - Pocket Full of Sunshine Lyrics Meaning

I think this song is about infidelity.

She is with someone who doesn't treat her well ...
Do what you want,
but you're never gonna break me,
sticks and stones are never gonna shake me

Wish that you could,
but you ain't gonna own me
do anything you can to control me

But has a secret love ...
I got a pocket,
got a pocket full of sunshine
I've got a love and I know that it's all mine

The secret love is the one she turns to (place where she goes) to get away from the pain caused by the person she is with ....
There's a place that I go
That nobody knows
Where the rivers flow
And I call it home
And there's no more lies
And the darkness is light
And nobody cries
there's only butterflies

And her dream is that someday she can escape the person she is with and be with the one she loves ....
Take me away (take me away)
A secret place (a secret place)
A sweet escape (a sweet escape)
Take me away (take me away)
Take me away (take me away
To better days (to better days)
Take me away (take me away)
A hiding place (a hiding place)