Sandra wanted to escape with MC bc she knew that her daughter is gone but didn't tell him shit for some reason.Instead she tried to seduce him but he was still trusting her to be his last hope to get his gf back until the end.All characters just fuck you over in fallen hero thats whats depressing to me bc I cant do shit.If game actually gave me option to escape with Sandra I would.I dunno It feels like devs made characters dumb in this route just so we have million shocking plot twists.
Odds are that Sandra was conflicted. After all, running away with Harry meant abandoning her daughter, this time for real, to Luca. Dumb as she is, she likely realized what that meant in the long run. On top of that, she's a nympho. Whatever else Luca is or isn't, he's definitely good in bed, and he did guarantee and amazing sex-life and a good, if fucked up, relationship with her daughter, something that Sandra genuinely craved.
So at that point, she was likely definitely torn. Stay with her fucked up daughter? Run away with the MC? She couldn't just make that kind of choice, not easily.
If Harry pushed then, yes, they could have run off together.
The issue is that Harry's personality wouldn't allow him to do anything of that sort. For one, he's simply never that decisive right away. For two, he hadn't known Sandra for that long. For three, he was completely deluding himself about Laura and ignoring the warning signs. His character simply wouldn't allow for such a choice to exist. By that point, he was simply already doomed.
As for communication issues. The thing is... This is a NTR VN. NTR plots literally cannot work if the participants are completely reasonable human beings with normal levels of observation skills and the ability and willingness to properly trust and communicate with each other. Luca's whole scheme would have never worked in the first place if Laura genuinely trusted Harry and talked to him from the start about what was going on the moment Luca threatened her. The blackmail is extremely dumb and extremely easy to get out of if you just stop and think, and even in the extreme case where Harry somehow, in some extremely absurd universe, ended up in prison for a year or two, they'd have still been fine afterwards and Luca would have gotten absolutely jack and shit out of it all.
That's leaving aside the massive plot hole involving the security in that building. Anyone's that's worked in any tech company knows that there's cameras in EVERY important room and especially covering the entrances and exits. There will NEVER be allowances to turn off cameras in your own office for any reason. Even if there were, you'd always, absolutely, have to provide a good reason for doing anything like that. So in any real office building, even 10 years ago, it'd be extremely obvious that Luca visited Harry, talked to him, got him to go and take something from the office. Which means he'd be just as much of a suspect as Harry, and unlike Harry, he's an outsider to the firm and a mafia kid for a known mafia front. Who do you think the police will want to fuck over in that sort of situation?
But somehow, their office building only has cameras in a couple of offices? Really? In what universe?
I dunno about other people, but for me, to enjoy NTR stories, I need to turn off my brain quite a bit. At least this one tries to make an effort to justify the character's quirks and problems due to their varied issues.