Dear Ash1019:
You're in a challenging situation, and it's good you're looking for help! Having parents split up is a huge trauma for young children--their entire world is upended. They know you are under tension, and they can't find the sense of safety they need in order to function well.
Children's minds need a fairly constant sense of connection with a loving person in order to function well. You've had a real challenge with twins from the start! No one person can fully meet the attention needs of two infants! So they've got some experiences of "attention deficit" in their emotional memories, no fault of yours! But those moments when they needed someone and there wasn't enough attention to go around have left emotional memories, which are stored in their minds. Those memories cause trouble. When you answer the phone, for instance, they see that you're not available, and that's not a crisis for a two-year-old, but it felt like a crisis when they were infants, and that feeling can get triggered by something like your momentary phone call. So although you get right back to them, you could easily have two children who now feel like they can't get enough attention. They can't feel what you're giving, because their emotional memories have been triggered, and they are flooded with that feeling--"I'm not getting enough!"
When they can't feel enough of a connection, their minds become filled with emotion. They feel scared, and become edgy, separate, revved up, or perhaps they sink into thumb-sucking or other self-soothing behavior. In this state, they're easily upset. Their behavior is clearly out of whack. You set a limit, and they can't comply. Appealing to the reasoning center of their minds--the prefrontal cortex--by setting up rewards and punishments just doesn't work because while their behavior is off track, the reasoning part of their brains doesn't function. They literally can't think, can't make sense of anything you say or of anything you ask of them. They are, during those times of feeling disconnected, governed by their feelings.
Here are two things to do. If you do them, things will get better, I guarantee.
First, Special Time. With twins, you'll need some help with this! Find a friend or set up staggered nap times or take quick advantage of accidental one-on-one time. Somehow, find separate time for each. It doesn't have to be much. Tell your child that it's her Special Time, and that for X number of minutes, you will do whatever she wants! Any kind of play is OK. Turn off the phone, tell others in the house that you won't be talking to them for the next x minutes, and devote your full attention to her, doing whatever she wants, and showering her with warmth, closeness, eye contact, and interest. Set a timer for this. When the timer goes off, tell her you loved being with her, and when the next Special Time will be. Don't make it dependent on anything--no saying, "When you get your teeth brushed, then you can have Special Time." She gets it because she's your precious daughter, not because she earned it.
This kind of time, done once or twice a day, can help a child feel more connected to you. It helps her feel more emotionally safe. But, let me tell you also, that after Special Time, the emotional tension she carries, that gets her into trouble time and time again during the day, will be closer to the surface. She may throw a tantrum because Special Time ended. Or shortly thereafter, she may have an emotional crisis because jam is falling off her toast. That's when you use this second "Listening Tool," that does the work of helping her get rid of the stored upset that's in her way of being her loving, relaxed, playful self.
When she finds a way to get upset, move in close, put your arms around her loosely, and offer eye contact. If you have to set a limit, do it with warmth. "Sweetie, you can fix the jam on your toast yourself. I'm not going to do it for you." or "No, I'm not going to make a new piece and cut it into rectangles. I'm going to stay here so we can look at the triangle toast."
You move in, set the limit, and then, listen. Don't talk. Don't explain. Don't give a lecture. She needs to pay attention to the feelings she has that are erupting. And she needs you to connect with her, offer warmth and safety, and stay with her while she pours out all her upset. It will be "ugly,"--screaming, crying, stamping, throwing herself down, flailing , sweating, going wildly out of control. Contrary to everything you've ever been taught, this is GOOD. This is how bad feelings get out of children's systems. If you can hang in with her, and tell her, "I know it's hard, honey. I'm here. I'm going to stay with you while it's hard." and "I'm going to hold you so you stay safe. I'm not going to leave you while you are feeling so upset." and "I know you can lick up the jam." or "I know the triangle toast is good to eat."
She expels the feelings. You pour on the connection and the warmth. That's what her system needs for her to recover her ability to think. Her brain needs the bad feelings out of the way, and a strong sense that someone is keeping her safe and loved, to restore her ability to think and act with good sense.
We call this Staylistening. There's much more about it, and many anecdotes from parents who have used it, at the site listed below. It meets a child's deep inner need for closeness, and their need to have a big "emotional poop" often enough to keep their minds humming and their spirits cooperative and loving.
With twins, you've got more to do than one person can do. The above "Listening Tools" will work, but you'll need to find ways to have another loving person on hand at times.
Your children love you, and want to feel close to you. They want that more than anything else in the world. The website below will give you more resources to learn how to help them offload the emotional tension that's clouding their behavior, and how to set up some emotional support for yourself, as well.
All the best to you,
Patty Wipfler