That whole explanation from Madison I should fix to be more clear it's an oversight on my part there.
I'll try to do a walkthrough as best I can but it's hard to do precisely because of how the stories overlap and branch but I'll try to break it down by character:
Amy:
- Talk to her to get scavenger hunt
- Tell her you're ready
- Receive BJ
- Next item
- Get camera
- Use camera with SD card
- Tell her you got a camera
- Take picture while she's masturbating that has her in it
- Give her camera
- Get next item
- Switch to
Stephanie's story until*
- Tell her Stephanie has a landing strip
- When they're done having sex talk to her again
- Switch to Vickie's story until**
- Talk to Amy
- Amy and Vickie have sex
- After they have sex give Amy Vickie's panties
- Talk to Amy again
- If you choose not to continue scavenger hunt talk to her until she decides to have sex with you then always available for sex and story ends here
Else:
- Talk to Amy to get next target
- Talk to Katherine until you get the "What do you think of Amy option" (you'll need to hear about her girlfriend standing her up tonight)
- Talk to Amy and tell her Kat's conditions
- After they have sex talk to Amy for the next item
- Switch to
Rachael's story until***
- After sex with Rachael talk to her to get the next scavenger hunt quest
- Talking is all that's needed for the next one
- Once Amy is done having sex with Madison then Ashley talk to her to get the next scavenger hunt quest
- Switch
Brittney's story until****
- Get the broom from the closet in the room with the paintings in it
- Get the speaker farther from the windows in the living room
- Go behind the hot tub and use broom with mound of dirt
- Use speaker with broom
- Turn on speaker
- Get Stephanie to dance outside (either talk to her or turn off the other speaker)
- Suggest Brittney get in hot tub
- Ask her what she thinks about Amy
- Tell her you can get Amy naked if she does first
- Talk to Amy and tell her you have a plan
- Get naked
- Get in hot tub and wait for Amy to get there
- Advance through truth or dare with any questions until both girls are naked
- Ask Amy to take picture
- Wait for Amy and Brittney to finish having sex
- Talk to Amy again and she becomes available for sex with player
- Story complete
Ashley:
Note this story is mutually exclusive with Madison's but they end in basically the same way
- Talk to Ashley at least once
- Talk to Madison at least once
- Get Madison's phone from bathroom
- Exhaust Ashley's dialogue
- Give phone to Ashley
- Get diary from safe (use paper with notebook in her room and pencil with paper)
- Give diary to Ashley
- Talk to Ashley until no options left
- Talk to Vickie
- Read Diary
- Talk to Ashley
- Give Ashley 2 Natty Lites
- Give Ashley lit joint (use paper with marijuana then joint with fire pit)
- Give Ashley 2 more Natty Lites (may be 3 not 100% sure)
- When scene finishes talk to Ashley
- Both Ashley and Madison should be available for sex with anyone naked and not having sex and the player now
Brittney:
- Talk to her until you exhaust all dialogue with her
- Switch to
Stephanie's Story until*
- Tell her you got Stephanie to dance naked (or topless I forget which word I used)
- Wait for her to get to Stephanie****
- Story on hold until Amy's scavenger hunt is complete (either way works)
- Ask her what's wrong
- Talk to Katherine and ask her if she's up for teasing Stephanie (may have to ask her what she thinks of Stephanie first)
- Wait for Brittney and Katherine to finish having sex
- Have sex with Brittney
- Brittney becomes available for sex after she's done having sex with Stephanie
Katherine:
- Get rum from liquor cabinet
- Talk to her about her GF
- Ask to get her a drink
- Ask her what drink she likes
- Tell her you got rum for her (this will pause her story until you give her rum)
- Give her rum
- Ask her what it takes for a 100% chance to get with her
- Talk to Rachael
- Ask Rachael another personal question
- Ask her if she's ever fucked a blonde girl
- Suggest she try Katherine
- When they're done having sex ask Katherine for sex
- She then becomes available for sex whenever
Madison:
Note this story is mutually exclusive with Ashley's but they end in basically the same way
- Get Madison's phone from the bathroom
- Give phone to Madison
- Ask for a reward
- Talk to Ashley about her situation with her clothes being wet and agree to help
- Give Ashley the towel
- When she gets to spare bedroom ask her for her clothes
- Give her clothes to Madison
- Get to the room Ashley is in before Madison
- Watch dialogue between Ashley and Madison
- After they have sex talk with each of them
- They can now both have sex with anyone that is naked but not having sex and the player
Rachael:
- Get thermos from liquor cabinet
- Talk to Rachael until you receive the get thermos quest
- Give Rachael the thermos
- Talk about dare night with Vickie
- Ask her for her phone number
- Ask Madison for Vickie's number
- Talk to Katherine about sending text messages and give her both numbers
- The dares become available under the following criteria:
- Spend the rest of the night naked - first and mandatory dare
Amy - Scavenger hunt is at the fuck a redhead stage (girl you just met tonight)***
Ashley - Naked but not waiting for her clothes and not having sex with anyone (girl you lost your virginity to)
Brittney - Naked and not having sex with anyone (biggest tits at the party)
Madison - Naked and not having sex with anyone (host of the party)
Stephanie - Naked, not having sex with anyone, and asked Stephanie about Madison (girl you got caught fucking at school)
Player - At least 5 dares have already been done (will probably lower this on further review)
- Once she's had sex with the player once she's always available for sex
Stephanie:
- Talk to her until she talks about whippits
- Give her whipped cream from fridge
- Tamper with thermostat
- Get Chardonnay from laundry room closet
- Get Merlot from garage top shelf to the right of the door as you enter
- Give both Merlot and Chardonnay to Stephanie
- Suggest she dance naked*
- Talk to her and you'll be able to have sex with her
Vickie:
- Talk to her until she gets in hot tub
- Get undressed and sit in hot tub with her
- Submit to her tests
- After hand job go find someone to orgasm with once (Amy and Stephanie should be available at a minimum)
- Talk to Vickie again
- Take her panties
- Have sex with her**
- Available for sex from here on
- Story continues after Rachael has had 3 dares, Ashley/Madison story is complete, Amy's scavenger hunt is done one way or the other, and Katherine and Brittney are available for sex
- Once these conditions are met talk to Vickie
- Talk to Stephanie (ask about porn)
- Talk to Vickie
- When they finish having sex talk to Vickie
- Talk to Brittney (ask about porn)
- Talk to Vickie
- When they finish having sex talk to Vickie
- Talk to Katherine (ask about porn)
- Talk to Vickie
- Talk to Katherine
- Follow Katherine to Garage (try to be there before her as she closes and locks the door)
- Listen to the dialogue
- Wait for the two to finish having sex
- Both should still be available for sex but no longer be interested in sex with anyone but you or each other.
That's the full walkthrough. I do recommend working on each individual story one at a time as multiple characters having sex at once or the player masturbating can cause weird issues since the way to check for two people having sex with each other is imprecise at the moment