My son and my sister (their 3 months apart) will not stop fighting. its like you guys only see…

My son and my sister (their 3 months apart) will not stop fighting. its like you guys only see eachother like twice a year so enjoy it... I decided to give my mom a break while shes here for 4 days so she can visit with friends and its turning into a disaster for me. i keep having what feels like i pulled a muscle in my groin area and trying to lay down toddlers because i have to be up at 4 to make sure my boyfriend gets up and ready for work.