I have 2 females and they did fight rarely, but as it being a puppy from her it should be no problem since she would be raised as mom and daughter. If you keep a boy he will want to mate with her and that would be a problem. I am not an expert and far from one this is just my opinion. I did get both of my girls fixed and it stopped the fighting but they are not mother and daughter.  Good luck with what ever your choice may be.