If you're wondering, why not send a quick polite email to the photographer asking how the shoot went and if he was able to give the photo to your brother yet? Thank him for his time and effort, especially since you live so far away and weren't able to give the gift to your brother in person. Tell him you're excited to see the shot and look forward to getting a copy from him, and that if he prefers he can email it to you and you'll pass it on to your mum.

Don't over-complicate it hun. Xo

That is a brilliant suggestion - thankyou!!!