I'm of the school of thought that people who go Bridezilla-ish when they're getting married aren't just sufferint from temporary insanity. I think they're showing their true colors.
POD. Plenty of brides and grooms are stressed out about their weddings. Plenty of people are stressed about life, in general. Many of them still manage to be thoughtful of others.
Laura didn't have to have Susan in family wedding photos if she didn't want to. DH and I had a BWW, but we didn't have extended family in posed photos.
But Susan isn't extended family. She's the groom's sister! That's immediate family.
Depends on your viewpoint. Once the bride and groom are married (and possibly have kids, or bride and bride, groom and groom are married - as discussed up thread by others) they are immediate family and their siblings, parents, etc. are generally then considered extended family.
Ok, fine, but honestly when most people say "family wedding photos", they mean "wedding photos with original family members of the bride and groom". I've never, ever, ever heard anyone use the phrase 'family wedding photos' to refer to pictures of the bride and groom only, with no one else. Then they'd just be 'wedding photos'.*
It's hugely common to have 'brideandgroom and bride's parents/siblings', then 'brideandgroom and groom's parents/siblings', etc.
*I could see someone using the phrase 'family wedding photos' to refer to a bride and groom with children shot, but as it doesn't appear that this particular bride and groom have children, it's not that relevant.