Styling the widget title when it’s the current page

I love this plugin. It does what it’s supposed to do.

I have the widget in a sidebar and with some custom CSS I’m styling the current menu item differently (li.current_page_item a) to make it stand out in the list.
This works great on child pages. But I would also like to alter the appearance of the “parent page title”, which is used as the widget title. Would this be possible to do? I think it’s always a h2 class="widget-title" and it would be nice if it got an added current_page_item class for example when it’s the current page.

Thank you.