I see your point Semi, but I can see the logic in Packards comments too. It's like someone acting as if they have sinned with the food and heavy drinks, so the added Cardio is a form of punishment for sinning.
Either that or the exercise equivalent of several hail marys

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Plus the extra Cardio could result in overtraining. Altough you're not doing masses as you state, this compensatory behaviour could change how you think about what you do. At the moment the controlled indulgence is fine, but if you suddenly get moments where it can happen off schedule, like Weddings, Funerals, social engagements with family, etc etc, that means you may indulge in the week and suddenly the same thinking will occur. I must compensate for this with extra Cardio.
Before you know it you could alter your mindset to, "I can indulge a bit, becasue the extra Cardio I do, corrects the issue", then because you're not getting residual after effects to weight, the Cardio can't shift, leading to slow weight gain, it could make you feel confident that any time you indulge, you have a get out clause, that allows for it to happen, with no repercussions.
You're in control of it now, by keeping indulgence for weekends, but how long before one or two other occasions to indulge, coupled with added Cardio, knock your mindset, because the indulgences become a tad more frequent, and you suddenly develop a want for them more frequently, knowing you have a way out from the side effects.
It wouldn't necessarily take much, to get you to fall off your perch, then you're in a potential cycle of indulge, Cardio punish, indulge, Cardio punish.
After all most people who get into emotional cycles, have to start somewhere with whatever they end up being controlled by. That first thing, or time, then steady progression to harder things, or more frequent instances, without necessarily realising it becomes more frequent, or more of an issue, even when brought up by those on the outside looking in, denial or words like "I can handle it, I'm in control", lead to an extensive problem, coupled with more denial, even anger at people showing negativity to your actions. Miscontrewing care for lamabasting, or haranguing.
It can become a slippery slope, some don't know how to avoid.
I'm not trying to use shock tactics here, to proclaim you to have some sort of problem, but by the looks of things, right now you seem to have control of when you indulge, but how long can that last, or would you keeping control, even be destined to be a constant thing?
Only you can truly know, if you're able to conscience your actions in life as a person. Whatever others think, you must like we all must, try to do likewise, (sometimes only hindsight helps us).
So I'm not lecturing you, just being honest with you. You deserve that honesty, and I wouldn't ever come here and B.S. people, because that's not bag.
If you believe you can maintain this situation, and stay completely 100% on top of it, then who am I to say no, or force you to do otherwise, when I can't. All I can do like now, is give you potential insights or considerations about a given situation, that maybe you hadn't considered before or factored into the equation

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