my pregnent molly killed my2 sucker fish and 2 neons.
 

This is the second time that she has became pregnent but she wasnt killing the other fish infact she was pretty sweet! now she is killing off the little fish my suckers and neons. i put her in isolation and she does have a male that stays bye her side constintly the other male stays clear of her and the other male. dont want her stressed and dont want other fish killed- any addvise

so ifound out that she didnt do it. its her boy friend! dadadun....

That must be why the other male steers clear of her. Fear of incurring the wrath of her mate. It might be better just to have one male per two females to prevent aggressive behavior.