I discovered that you can ask Allison whether she's actually busy on the weekend
Where in the game are you?
The question appear near the end of Chapter 4, after "With pleasure, sex-toy." and "I have a question for you."
Here is one of the paths that got me the interaction:
⇝ Now is not the time.
⇝ Speed up, fucking her harder.
⇝ Keep going, but slow down and delay your orgasm.
⇝ This is perfect, just the right speed... keep going.
⇝ Speed up; you can feel how much she wants it.
⇝ Stop... it's time for that thing she loves.
⇝ "You will cook and serve dinner naked tomorrow."
⇝ "Speaking of swallowing..."
⇝ "I should deal with that text."
⇝ "My weird ex. Now, we both have big days tomorrow."
⇝ The next morning you are awoken by a pleasant surprise.
⇝ You have something to check out on your phone.
⇝ You find one that reminds you of wait. You hear familiar noises from the shower.
⇝ You wander off to set out breakfast.
⇝ So, you head off to work.
⇝ I could never say no to you. What's going on?
⇝ How could anyone walk out on you?
⇝ So, why get in touch now?
⇝ Let me think about it.
⇝ Then you call Allison.
⇝ After work, you head home.
⇝ Time for other activities. The situation with Annie can wait.
⇝ ... cuddle up to Allison for the night.
⇝ The next morning you wake up alone.
⇝ You check your phone.
⇝ I still can't believe you're asking after what you did.
⇝ I'm listening.
⇝ And what kind of apology did you have in mind?
⇝ It sounds like you want help with more than paperwork.
⇝ If I'm going to risk it, I need an explicit commitment.
⇝ I'm sorry. I want you, but I can't.
⇝ And then you text your friend.
⇝ Annie.
⇝ Perfect. See you then.
⇝ And then you call Allison.
⇝ ... head off to work.
⇝ "Avoiding some heavy life stuff."
⇝ "My ex-wife has rematerialized."
⇝ And then you get back to work.
⇝ And then you work until it's time for your date with your friend.
⇝ You bring up asking Allison for an open relationship.
⇝ "Things have changed with Allison."
⇝ "She's been very sexual, in new ways."
⇝ "It might mean she's cheating on me."
⇝ "Just a feeling I have. I don't really have any evidence."
⇝ "Very much! I'd hate to think of her with another man."
⇝ "Cheating's cheating."
⇝ "I would like to focus on the woman in front of me. Shall we...?"
⇝ You bring up your conversation with Emma.
⇝ "I'm stalling, though. The situation with Annie..."
⇝ "Her new guy left, and she's panicking?"
⇝ "Well, we'll see if she gets back in touch. Now, shall we...?"
⇝ You mention dinner that night with Renée and her boyfriend.
⇝ You give her a chaste kiss, take your leave, and head home.
⇝ You help her up, and head to dinner.
⇝ You knock.
⇝ "Excuse me for a moment." You duck to the bathroom.
⇝ So, you follow Renée into the kitchen, having taken the ring.
⇝ "How did you know about that?"
⇝ "I'm not angry at her anymore, but there are limits."
⇝ "Well, I tried brainwashing her to accept it."
⇝ "How can I say no to that?"
⇝ You follow her back to the living room.
⇝ You ask what the conversation you walked into was.
⇝ As the evening winds down, you say your goodbyes.
⇝ You turn to point her out to Allison.
⇝ You head to the car.
⇝ "No! What makes you think that?"
⇝ "Would you like to get away this weekend?"
⇝ "Is everything OK? You've been a little different these days."
⇝ say, "Well, then, roadside blowjob?"
⇝ You finish the drive home.
⇝ Ignore it.
⇝ "With pleasure, sex-toy."
⇝ say, "I have a question for you."
⇝ "Do you really have to work this weekend?"