I think if you forward he'd not be able to go. I think you need to add her to his 'friends and family' section, so if she doesn't have an account yet set her one up so she has a supporter number, then you should be able to do it from there. I think you do it match by match, so I'm not sure you can do it yet but should be able to once the matches are showing?
The site says:
"Alongside the reduced risk of lost and stolen tickets, mobile ticketing provides the flexibility to transfer your ticket digitally to people linked in your Friends and Family. This means that you will be able to transfer your mobile ticket to your friend or family member for the matches you cannot attend.
You will be able to do this from your account on a match-by-match basis, removing the need to meet face to face to pass the ticket to them. Please ensure your Friends and Family list is up to date in your online account throughout the season. Ticket transfer is only available with mobile ticketing."