I think knowing the ages of the children would be helpful, as would the information on do they live with you full time or just come for visits.
A lot of it is attention and control for them, like it is with all children. Yelling at them is a waste of your time, energy, and it gives them exactly what they want, you out of control and them in control. It allows them the ability to cause a problem between you and your husband. It is also not acceptable because you children see you being manipulated and will soon learn to treat you the same way and will use the same methods to divide you and your husband.
You have to decide not to allow them to be in control. Talk to your husband calmly about it, not in front of them, and come to some kind of arrangement with him about how to handle the situation. He has to support you and then the two of you need to sit down and tell the children you are in charge if he is not there. They are children, you are the adults, and they will be punished if they are not going to mind. If they are hitting, biting, kicking, etc. then tell them they will A) not be allowed to participate in family activities and B) you might have to call social services/police to protect the other children and will do so. Do not make this a threat, make this a reality. You also need your husband to explain to their mother disobeying will not be allowed to continue.
Example: Put up a chart, when you ask the child to do something and they do it they get a star, the second time you do not ask them to do something you tell them and they get a check mark if they do it, the third time you tell them there is a punishment involved like no dessert or snack for them when everyone else has one. If it is a matter of picking up after themselves and they won't do it don't yell, just pick the stuff up, put it in a bag and they don't get to have it back for a few weeks. If they don't want to get dressed and you have to go someplace I guess they will go in their pajamas. If they won't go to time out or their room when told you have to ignore them until your husband gets home then sit him down, explain what they did/didn't do calmly (and calmly is the key here) and he and you together need to go to the guilty child with him standing behind you and you then put them in time out or their room for double the time orginially set upon. Punishments include game time with dad and the rest of the family, being put in their room when the rest of you are watching a movie together, or being left home with a sitter while the rest of you go out someplace (and this can be as little as going to the park for an hour or so to going to a fast food place for a hamburger or ice cream to as major an outting as a trip to the zoo.)
You also have to reward good behavior with something when a certain amount of stars are gained. Rewards can be for every ten stars they earn the right to pick out a Saturday night favorite dinner or dessert, a dollar, or they get to pick out a movie for the whole family to watch or a game for the whole family to play. Set the rewards and punishments and make them for all of the children involved.
Whatever you decide to do remember you and your husband have to decide on the reward and punishment chart together and he has to support you. If you are yelling you are putting him on the defensive as well and you have just lost the support you need.
I will pray for all of you.
P. R