How to send CC form to parent

Hello all! I'm a very new SimplePractice user and a very new therapist as well. I'm still getting SP set up and it seems to be going well. I have one client so far and he's a 25-year-old man. His mother is paying for his sessions. Is there a way for me to send her the credit card form directly and have it still linked to his account? He's signed an ROI for her. 


Thank you!