Living room event 3 is supposed to have a chance to trigger when you go into the living room with just Ezri there, after day 32. But I just tested it and couldn't get it to trigger. I'll double check the code, maybe the odds need adjusting, but if you want to try it yourself:
- Make sure you haven't had a random event that day. Turn morning event probability to 0 and go to a new day. If you get any other event, you'll have to try a different day.
- Find a time when Ezri's in the living room on her own.
- Repeatedly go in and out of the living room until it triggers.
Like I said, I didn't have any luck, I kept getting an event with Scarlett instead. I know it does work, but the odds might be too low at the moment.
As for the backgrounds:
- Side character 18 is Freya: replay her scene and give her oral in the chair; don't ask her to move to the desk
- Group shot 2 is from the truth or dare party. Make sure you have Scarlett to at least relationship level 4, then replay the scene and dare her to take her panties off, then for your last choice select dare so that you're topless.
- Group shots 10-14 are from the day 60 party, and are rewards for different characters winning the first part from their show. Replay the scene, then you can rig the game in a specific characters favour. First talk to them and make sure they're doing their sexier show. Then during the shows, give them max score, everyone else 0, and make sure your own show is rubbish. Then when that person wins, they'll request a picture, and you can ask them for a copy if your voyeurism is decent.
- Scarlett's 15th appears to be inordinately difficult to get. It's supposed to be when chatting in her room, you'll sometimes have the option to look up her skirt, then when she opens her legs you get it, but I couldn't trigger that either. I'll double check when it happens, and in all likelihood I'll just add an option to ask her in the next update.
Sorry a couple of things aren't working properly for you, but I hope this helps you get most of them!