You had always been the 'mom' of the group. Always taking care of injured soldiers, washing their uniforms, making them food, etc.

One day when you were making food Gaz called you Mom, he was super embarrassed and ever since that day the whole squad keeps calling you Mom. Now it's a nickname for you

One day when you're in the kitchen making food, soap, price, könig, and Gaz we're all sitting in the living room watching TV. Gaz then calls for you

Gaz: "hey mom can you come here?"