URGENT – follow up from Comments on ThemeForest

Hi
You’ve asked me to follow up a question from the Comments on ThemeForest here…

I’m using another theme for a site that I’d like to change for your’s
The page has a background (the dress) which I’d like to make disappear when viewed on mobile or tablets as it gets in the way of the writing.

http://becauseiloveyoubridal.co.uk/diane-harbridge/

If you’d like to log into the back end please email me (so it’s not public on the forum)

If it’s possible, I’ll then replace the second site’s theme by buying another copy of your theme and using it there.

Hope you can advise tonight, as I see the client tomorrow, so it’s really urgent for me
Thanks
Mark