I think I have read too many romance novels

Can we talk romance plotlines for a second? The billionaire wants a kid but he wants to conceive it the old-fashioned way... Which billionaire would leave that much up to chance? You could end up having sex for years with no baby to show for it! He's much more likely to opt for IVF imo. Extract the eggs, provide the sperm, pay the lab guys to ensure there's a viable embryo, and then get her to carry the baby to term and give birth. He has all the money, he can afford IVF. He'll want to ensure he gets the kid he needs in order to secure his inheritance or whatever. 

Speaking of which, I always wondered if those types of clauses in the grandfather's will could be enforced. You know the ones: grandfather requires grandson to be married within six months in order to inherit, or all the money and other assets will be donated to charity. Surely this could be challenged in court. It seems absolutely bonkers to me. It's not like the assets are held in a trust; that would be different, the trustees would have to abide by the parameters of the trust but when it's just a stipulation in the will, can it be upheld? 

And finally, the trope where "I hate her, so to get my revenge against her, I'll force her to marry me." Err hello are you thinking quite clearly? You hate her but you want to legally tie yourself to her and see her face across the breakfast table every morning? What??? I think it's more that you hate yourself. You might need therapy, boyo.