Can you see how you turned a simple choice into a complicated situation. Your choice was to let your daughter stay home or go with you and you take her to gymnastics or not see her. Seems clear to me. Sounds like you want all or nothing.
Of course she waffled. She had already agreed to go with you. Then you ask her to choose. She already said yes. She was confused. You insisted she once again choose. You felt she was pushing you away. She felt you were pushing her away. You seemed to be turning this simple arrangement into proof that she wants to see you. Perhaps she was thinking you didn't really want me to go. Seems to me that want her to prove that she really wants to go.
She's a child. She hasn't had a relationship with you for years. You're fortunate that she agreed to spend time with you. You want her to make an adult decision when the adults have already decided.
I urge you to get counseling! Right now, you're messing up the kids minds. When you ask children to prove they like you, you are asking them to do the impossible. You abandoned them. Why would they even want to be with you? And you've added to their stress by saying you want them back. Of course she doesn't want to see you. Her Dad encouraged her to spend time with you. You blew it.
You have to start over with your kids. You have to first build trust with them. You can't start over as if the past hasn't happened. You are a stranger. How do you gain the trust of a child? Counseling might help you to understand the situation in which you were a major player?
If your goal is to be reunited with your children, there are several stages to g
Getting there. Sounds like you're at the first step, being with your children as long as it takes to win their trust. This will not be easy and may take a year or more. I suggest you will need to take whatever you can get. Expecting anyone to feel comfortable getting to know you during early visits is unrealistic. I literally mean anyone. Do you expect the woman you met at work and 9invited to lunch to then be your best friend? You cannot change their behaviour because you birthed them. You have to prove yourself to them that you can be trusted with their feelings. To be trusted that you will protect them. That you want to see them because of who they are; not because you gave birth to them.
You're excited but they are not. Please get counseling, if not for yourself, for your children. You want them in your life. You have to make being with you fun. Asking your daughter if she wants to go puts her on the spot. Then blaming her for your lack of understanding is outrages.
Later: After thinking about you and your children, I'm aware of how difficult and painful this is for you. You are wanting something that will not happen; regaining custody of your children. The court, at the very least, will require that you have a stable living arrangement of at least one year. The court will require that you have a successful relationship with your X and his wife. You will have to prove that sharing custody is best for the children.
I've had a professional relationship of several years with Family Court. I've seen parents try to gain custody and fail. I suggest you're trying to get your kids back without knowing how to go about making that happen. Or even if it's a possibility. If you haven't talked with a lawyer, I urge you to do it. You need to know the legal requirements so that you can make a plan to do what the law requires. My sense is you're throwing everything in to this situation causing you and your children much pain and anxiety without knowing what you is legally required for or even if it's a possibility.
Moms have said a few basics such as a stable home and regular visits. I want you to find out if there is a way to regain custody. Only a lawyer can tell you that.
How and why the court ordered legal and physical custody to your ex will tell you if you have a chance for custody. If your parental rights were also a part of court order. If they were, there is nothing you can do to get any form of custody. If your rights have been terminated, you are so very lucky that your ex is helping you have visits. He could tell you no and make it stick.
I have personal experience with terminating parental rights. I adopted my daughter after her birth Mother's rights were terminated. Her birth mother was unable to take care of her children. The judge told her birth mother that if she wanted to see the daughter she gave birth to she had to convince me to let her see her. Have your parental rights been terminated? If so, your ex is a really "good guy." You can be a part of your kids lives because your ex allows it. I suggest you make your first goal to be getting to know your kids. And to treat your ex really nice.
If your parental rights have not been terminated, your goal still needs to be that you get along with your ex, his wife and the children. Getting along with everyone is part of the reason that the court would allow you partial custody or more likely order that you can have more time with them.
Another question that needs to be answered were any other agencies involved. If they said you should not have custody. You would need to show that you have changed. I suggest it's highly unlikely you could regain possible part time custody.
I've had professional and personal experience with family court. If your rights have been terminated by the court, you will be told that you have no rights concerning your children. You are lucky your X is encouraging the children to see you.
If your rights haven't been terminated you need to know if there is a possibility you can share custody. The circumstances which caused you to agree to full legal and physical custody will have to no longer exist.
I urge you to talk to an attorney so that you can have a realistic goal. I suggest just having the goal of getting to see your children will help you be less stressed. In your first post you want full custody. There are many steps to reach that goal. Focus on the children and their needs will help you and your children. Get help from a counselor. Your situation is so complicated, anyone would need help.