New fish confused?!

So I bought I new female Molly today or should I say meant to be a Molly?! I'm slightly confused because she likes an overgrown guppy?!

 

That is definitely not a molly

 

Lol nope hence the confusion, she has the body of a guppy the tail of a guppy but is twice the size of all our other female guppies.

 

I don't know but her tail sure is beautiful

 

She is stunning her tail is gorgeous.

 

It's a female guppy. Females can grow to about 3" including tail.

 

Oh wow you learn something new everyday. I wasn't aware they grow that big, thankyou for clearing that up... I was beginning to think she was a crossbreed. :-/