guppy breeding

Question
my 2 guppies have done great. 1 male and 1 female. they live in a 20 gallon tank with 2 male swordtails, 1 red neon tetra, 1 large algae eater, 1 bottom dweller (catfish),and 2 Mollies(1 male, 1 female). my female guppy is now pregnant and is behind a tank divider in the same tank. but, yesterday i bought a another female guppy ( she is smaller than the first) and she just stays near the bottom back of the tank. the male has not even seemed to notice the female or if he has noticed her he has no intention of breeding with her. Why is this?
                                             PS
i am soon changing my tank into an all guppy breeding tank.

Answer
She is probably settling in, give her time and they will both realise each other :)

As 'she' is smaller, it could very well be a male and thats why the current male isn't going anywhere near her/him.

You will have lots of guppies!

Good Luck  Jack