Shannon Engemann photos: Who is Larry King's alleged mistress?

shannon-engemann-shawn-king.jpg Shawn Southwick King suspects her own sister, Shannon Engemann, of having an affair with her husband, Larry King.

Shawn began to suspect the affair after finding out about a reported $1 million worth of gifts her husband gave her little sis, like a diamond necklace and a $160,000 car.  

So who is Shannon Engemann?