Boris Becker's pregnant wife looks on a romantic beach

It's been less than a week since Boris Becker's new mother-in-law broke the happy news that her daughter was expecting a child.

But, from the appearance of her swollen stomach, Sharlely 'Lilly' Kerssenberg couldn't have kept it quiet for much longer anyway.

The brunette beauty showed off her bump in a bikini on the beach in Formentera, Spain, yesterday.