[ealgeone]

A serious question: Can’t every Romam Catholic do that now? Commit a “grave” sin, get forgiveness, communion and then do,so,again in two weeks?

[Campion]

Not if he confesses intending to "do so again in two weeks". (In the case of a divorced-and-remarried person, the assumption is that they intend to go on having relations with their partner.)

A firm purpose of amendment is required for a valid confession.

[piusv]

When dealing with specific sins they still need to have a firm purpose of amendment. They must really want to try to avoid that sin (whatever it is). We are human. We will probably fall again, but we must truly want to try to change our ways, not just confess it so we can receive communion that week.

In this case, we have a couple that has divorced and remarried. They can't just confess this sin. This does not dissolve their invalid marriage. They need to rectify their living situation or there is no firm purpose of amendment. It is a first step in the right direction, but they still should not receive communion.