Hi I would have said late 30s to early 40s for the wedding photo, just going by hair styles, brides clothes style of photo etc.
In my opinion the couple on the beach are the same couple. The light is totally different and so is the image quality which I think accounts for the lack of chin cleft. Together they are proportionally very similar (tall man, petit woman), hair colour is similar as is facial shape. Have you any photos of her in later life?