Whether it is "allowed" to make a call with your girlfriend in the presence of your wife depends on the boundaries and agreements within your specific relationship. Different couples have different rules and expectations regarding interactions with people outside the relationship.
In some relationships, partners may be comfortable with each other having platonic friendships and open communication with members of the opposite sex, including ex-partners. In such cases, making a call with your girlfriend (assuming she is just a friend) may not be an issue.
However, in other relationships, partners may feel uncomfortable or see it as a breach of trust if one person is regularly communicating with someone they have a romantic history with or have feelings for.
The key to a healthy relationship is open and honest communication between partners. It is essential to discuss boundaries, expectations, and feelings with your wife openly. If you feel that making calls with your girlfriend is causing tension or discomfort in your marriage, it is crucial to address these concerns together and find a resolution that both partners are comfortable with.
Every relationship is unique, and what works for one couple may not work for another. It's essential to respect each other's feelings and come to a mutual understanding of what is acceptable and respectful behavior within your marriage. If necessary, consider seeking guidance from a relationship counselor to facilitate these discussions and help strengthen your relationship.