Lynne Graham 
Ruthless Magnate, Convenient Wife [EPUB ebook] 

Billionaire in need… Sergei Antonovich, a Russian billionaire, was famous for being knee-deep in stunning supermodels and aspiring actresses. But not one was suitable bride material. Would he ever grant his ageing babushka her dearest wish and present her with a grandchild? Of a bride and a baby… So, why not handle this challenge as business? Without emotion, but with a contract of convenience that granted him the perfect deal: a wife he’d bed, wed, get pregnant…and then discard…Pregnant Brides Inexperienced and expecting, they’re forced to marry!