Drop down menu disappears behind image gallery

Hi there,

I am having an issue where elements of my drop down menus are disappearing behind an image gallery.

I hazard to guess it has something to do with the z-index of either the menu or gallery but I thought I would ask the experts.

Any help welcome and thanks in advance.

url is

https://boudoirphotographymelbourne.com.au/whitepointboudoir