If you got that screen with that choice "Let me talk to her" is weird you don't get the variable that commit with Mallory also as you can see in this screenshots with URM, that variable num025=6 is one of the conditions to the next screenshot that also have num024=6 that is the condition to be committed with Jaye before, but you wouldn't get your screenshot choice scene if you weren't. So no idea what is wrong, but reading the resume I see some weird things like "You spent a sex-filled night with Mallory at a lakeside...." that doesn't appear in the resume of my playthrough and also the next one that says "......Mallory broke off your casual sexual relationship". I think those 2 shouldn't be there and contradict on how you got the poly choice with Jaye in the first place "Let me talk with her".
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After my 2nd screenshot scene do you get the scene in the bar with both Jaye and Mallory on 3rd screenshot? Must happen if the condition for the poly is true.
This is the screen that leads to the achievement "blended family" and I guess setting num050=2 that is the Jaye+Mal poly ending, even though I can't see (or I missed it) with URM when this num050 that is the variable that sets the endings for chapter 10, probably during the chapter 9 resume (in the 4th screenshot) but doesn't appear a path detected so not sure when.
Edit: I used the monitor variable num050 feature of URM and it changed in this screen (2nd screenshot bellow).
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Maybe I'm missing something but it seems weird your playthrough resume.