How to tackle the situation

your daughter is in her teens & hence in a phase where they are very self centred ,egoistic & really don't like preaching a lot......treat her as adult & when she screams or uses abusive language tell her that grown up adults don't use such words ...........ignore her as much as possible....

your son is 7 yrs old,youngest in family ,10 yrs younger then your daughter ........he can see where the authority lies.....he knows dad is not going to scold him.....you do so he calls you bad names..........make a deal with him......tell him that if you hear him call you bad names again you are going to complain to his teacher............use phone to record his bad words & make him listen.......tell him the next time you are going to complain to teacher............

boys in this age need dad.......ask your hubby to spend time with him like play with him on sundays or help in HW or something.........this is the stage when they look for role models & dad can be that role model but they need to spend time with fathers......busy fathers need to find time for their son which is even more important then having big savings for kids future.....