What you are referring to is not a law, it is an appellate opinion..the case is Rickets v. Rickets, you can review it on the court of appeals website.
it does state that under certain conditions, a divorce can be granted as constructive desertion if one party is refusing to have relations with the other..it does however leave the door open to deny such relief as well.
You would be best to review the specific facts of your case with an attorney before proceeding.
Under Ricketts vs. Ricketts which is available on our website at http://www.bwgmarylandlawyers.com on a fault based default the Court can grant an divorce. You have to look at the situation and facts.
Sign up to receive a 10-part series of useful information and legal advice about the divorce process.