wordpress programmer for correction on facebook share issue

We have a website which is a blog. There is small issue regarding face book share we like to correct the facebook image share we select a image and then share it that particular image need to be shared currently it is sharing only feature image irrespective of any image we try to share means "Make it so that if you share a hover over image it shares the image you are looking at only". max budget 20$ Need to get it done now