[Thorrez]

>To commit a sin with the intention of attempting to obtain forgiveness through reconciliation afterward is itself a mortal sin.

Source? If you do it with a mortal sin I can understand it would be a second mortal sin. But it seems harsh to make a venial sin into a mortal sin from this.

[simonh]

The venial sin isn't the problem, you're attempting to deceive God through manipulation. I would think anyway, not a Catholic.

[Thorrez]

I'm not sure I would call it deceit, God is all-knowing. I would consider it taking God's mercy for granted and treating him like a mechanical forgiveness dispenser.

I'm hesitant to say it's always a mortal sin, because it seems like it can happen in a lighthearted manner. For example if someone struggles with gluttony, that person might think "I know I shouldn't have a 2nd hamburger, but I'm weak and it would taste so good, I'll have it now and go to confession later". That doesn't seem like mortal sin territory to me.