Yours and his event

[sofaboy]

I'm composing an email and the sentence I want to write is:

"I attached the videos and pictures I have of yours and Michael's wedding."

For some reason the end of the sentence doesn't sound quite right to me. Is it grammatically correct and is there a better way of phrasing it? I find myself in this predicament too often!

I have one more question: should/could there be a comma after "reason" in the paragraph above?

Thank you

[Alan]

I would say of 'your and Michael's wedding'.

(Yes, comma after 'reason').