Female Endler is being too aggressive

Why is my female endler chasing off my male endler and being aggressive whenever he comes towards her?
I bought them the day before yesterday.
I've never actually observed the male try and make any advances since I bought them, every time he even considers or moves towards her she turns around and chases him away, they're usually at other ends of the tank at any given time except when I feed.

I've also got a juvenile aplocheilus panchax, he steers clear of both of them and likes to be alone.

 

Probably already pregnant and wants to keep the male off her.

 

Probably already pregnant and wants to keep the male off her.

That's literally my dream scenario, I wanted babies! Can you confirm it if I post a picture of her?

 

That's literally my dream scenario, I wanted babies! Can you confirm it if I post a picture of her?

Not so good with guppies and endlers, but being a livebearer, chances are good she is.

 

What ratio do you have? just the pair?

 

What ratio do you have? just the pair?

Yes. Also a juvenile aplocheilus panchax like i mentioned.
Also I should have probably said, there were 3 pairs of endlers together in the same tank at the fish store when I bought them. Including these 2
Never mind. She jumped out and died. Bummed out.

 

Oh wow... what a pity that she's jumped out...