Originally Posted by
Inversed
Yeah, Holly was in jail, Selina got exonerated of the murders after they brought Holly in at the end of The Rules Of Engagement. I will say them not actually showing this is kind of a mistake, since first time reading I was kind of confused over what happened, since Selina asks Holly to turn herself in so she can be happy, and then while it insinuates she does do that, you don't actually see or hear from her again until 50, when she's in Arkham, so that was all a bit confusing.
And I think ultimately the marriage thing is supposed to be symbolic for the two's benefit. The idea of marriage is something that would bond the two of them together more than they already would be, even if it would legally be a secret for the most part. Other's not knowing doesn't matter as much to them, and its moreso them wanting to be husband and wife for each other.