Nick Lachey and Vanessa Minnillo's engagement news on Thursday came as a surprise for everyone except ex-wife Jessica Simpson, who knew the day would come when the man she let get away would propose to another woman.

"Even though Jessica wants to be happy for Nick, this is a very difficult time for her," a friend of Simpson's tells me. "Nick was the love of her life then, man, and he was her first, so she will always have a very special place in her heart for him. She's deeply saddened."