Dispaly active nav menu link on child menu

Hi,
I am using the blue-grey-white theme with a child theme to customise and would like to display the active menu nav link as bold so the user knows which page they are on.

I have the fold_page_menu plugin installed and this allows child nav menu items to be displayed when the parent is clicked.

The problem is that when a parent is selected, not only is it shown as active, the child menu items are also shown as active and they should not be bolded unless they are clicked (it doesn’t look right).

I have used current_page_item to get the active link to bold via my CSS.

.sidebar li.current_page_item a {
color:#000000;
}

If anyone has time to take a look, the link is growperfectpeppers.com and the menu link with children is “gallery”.

Any help would be appreciated.
Thanks