Sure, but a better way to do that is to make sure both options lead to quality content, just content of a different kind. I'll be very disappointed if it turns out one choice (even my prefered choice of deleting the files) has unambiguously better rewards.
I'm taking it on faith that the MC is correct about what Victoria was about to confess and that we will follow up on this topic at the next available opportunity. I think it would be a narrative disaster for a cliffhanger to tease something the game has been building towards for 5 years only to divert to an unrelated crisis in the next update. That's not to say there can't be any surprises - it's entirely possible there will be a lot more to the story than we currently know - but the known facts of Vicky's porn career have to be addressed and should form the backbone of whatever other revelations might be in store for us next time. IMHO, of course.
When it comes to the MC's inclination to lie to Ian in comparison to him planning to delete the tapes, not all instincts are created equal. The MC's instinct to lie to Ian is his first response in a crisis, whereas his instinct to delete the videos is the result of an indeterminate amount of time pondering the issue. I very much doubt it was his initial reaction when he first stumbled upon his mom's videos. So I don't really see the two scenarios as comparable.
My point was that Grace wasn't interested in ruining Victoria's life, she was trying (poorly I agree, but still *trying*) to dragoon her into manipulating Ian. This implies that her dirty secret could stay buried if she just went along with Grace's demands. I take Vicky's request for the MC to bring Ian along with him as evidence that she will not go along with those demands - which would make it her choice to defy Grace by spilling the beans to the MC herself.
Again, this is obviously not something Victoria would have done absent Grace's base villainy, but it's still her choice. It's no different than saying Rose chose to become a Carnation rather than, say, choosing to work directly for Oliver or some other equally desperate option. A choice under duress is still a choice.
And in this case I do think it's instructive that as ashamed as Victoria seems to be about the skeletons in her closet, she'd still rather air them out than betray Ian's trust. Given that, it sure seems to me like following up on the topic, both to head off any other revelations and to help put her mind at ease, is entirely appropriate. Deleting the tapes is secondary to that, but I'd still say it's the more empathetic option given that Victoria is clearly not eager to revisit the details of those tapes with her son.
How is this in doubt? The MC being caught between his empathic and sadistic sides probably forms at least 20% of the game's text! They are both aspects of his personality, and a large part of our job as players is to tilt the balance between them. I suppose we could debate how much of those aspects is nature vs nurture, but I think we have enough contentious topics to mull over for the moment.