Two pregnant guppies fighting

[Nyceepoo]

I have 2 pregnant guppies. One bigger then the other but one of them keep chasing /biting the other pregnant guppy and is there a reason the pregnant guppy (not as big as the other but due in a 2-3 week she has also become more aggressive ) keep chasing the other guppy (the biggest one due to have fry soon) away from a certain area of the tank

 

[Retired Viking]

I have not seen this behavior with my guppies, do you have plenty of plant/decorations to break up the site lines for the fish? Maybe a picture of your tank would be helpful.

 

[Nyceepoo]

Yes I do, ever since I took the males out they started acting like this