The most effective way to deal with your teens' undesirable behaviour is to really understand what privileges you allow them. If it's late nights and going out whenever they want, tell them firmly that you will revoke these privileges. Have a sit down with your teens and your husband, calmly but firmly tell them that this sort of behaviour will not be tolerated. Let them know this is their last warning and any misbehaviour on their part will leave them grounded, for as long you feel fit. Make sure you are calm, firm and you stick by your word. They may test your patience and try to see if you mean what you said so make sure you are always consistent and stick to your decisions. Once they know you've put your foot down and won't be budging, they will start correcting their behaviour.