Rita Herron 
Here Comes the Bride [EPUB ebook] 

Kimberly Turner vowed never to let her twin sister Marci get her in trouble again…but when Marci offers her a deal to play phony fiancée to a friend in need, she can’t resist the money. After all, it’s going to help underprivileged children. And it’s just a weekend…what will it hurt?

Except the handsome architect, Austin Mc Dane is nothing like the men Marci usually tangles with. And when Kimberly meets his family and the charade snowballs out of control, she can’t help but wish the engagement – and the impromptu wedding she gets ropes into – were for real!