Now she's getting ready to move in with him and is talking about getting married as soon as the divorce is final. Her friends are horrified, but Rosalie doesn't seem to care how bad this looks. She walks around like a blissed-out teenager going to the prom with the captain of the football team, like it doesn't matter that she's stabbed her best friend in the back. Alas, poor Rosalie. Teenagers aren't the only ones whose hormones can turn brain cells to cake batter.
Friendship is a regrettable but acceptable sacrifice to make for such great love.
That this exalted and eternal romance will almost inevitably deteriorate into humongous disenchantment cannot be anticipated. Criticizing her won't work, nor will disparaging her intended. Try telling her that it would be in bad taste to rush into marriage with this man, or that waiting a few months might help convince her remaining friends that this is no mere infatuation. This could give her time to come to her senses, but chances are she won't hear you through the wedding bells ringing in her ears. On the other hand, Rosalie could be a slick, conniving little hussy who's been carrying on an affair with him all along, or is taking advantage of his vulnerability to seduce him.