Be open to communication: Discuss your feelings with your partner. Be open about your fears and worries, but also listen to his or her point of view.

Set your expectations: Be realistic about what your role will be in these children's lives. Don't try to replace their parent. Expect it to take time before you build a strong relationship.

Try to understand children: Find out about their interests, hobbies, school life and other things that are important to them. Try to understand how they see you and how you can make them feel more comfortable.

Be patient: The onboarding process may take some time. Children may experience different emotions and be unsure about you. Give them time and space.

Be consistent and reliable: Children need stability and reliability. Try to be consistent in your actions and words.

Don't Compare: Avoid comparing your partner's children to your own or anyone else's. Every child is unique and each has their own strengths and weaknesses.

Seek support: Seek help from a marriage counselor or psychologist if you are having difficulty coping with this situation. Sometimes an outside perspective can be very helpful.

Don't forget about yourself: Remember that it is also important to look after your own well-being. Find time to engage in hobbies, sports, and other activities that bring you pleasure.

We must remember that building a relationship with your partner's children is a process that requires time, patience and love. Be patient with yourself and with your children, and remember that you are taking an important step in starting a family.