Brother in law is birthdad

of our twins. He passed away from a drug over dose They had a grave side service we took the twins they are 4. My husband stood beside his dad and I stayed behind with twins they watched a movie in van and I took pictures of them with service in back ground. My husband told Birth mom we were there and she walk right past and didn't even look our way. I texted her and she said wrong number I know its Not what do I do? Just leave her alone until she contacts me?