It’s easy to understand why prenuptial agreements get a bad rap. We think of that rich guy, selfishly protecting his assets just in case wife No. 3 doesn’t work out. But it turns out that’s a pretty narrow view. There are plenty of people whose marriages have been made stronger by prenups. For Anne and Nick, it wasn’t a hedge against their marriage falling apart. It was an important gesture of trust. Email us at loveletters@boston.com.