A limited divorce constitutes permission to live separate and apart.
If you cannot prove your grounds for divorce, accusing your spouse of these grounds may be grounds for the award of legal fees to your spouse.
Pending the final divorce you should not do anything to give your spouse any grounds for divorce because it can probably be used against you.
In Maryland you cannot be living separate and apart under the same roof.
Or you go to a lawyer and have him draft an agreement that allows you both to remain in the same house and still be "separated".
This is not a garden-variety agreement, though, so don't do it yourself. You aren't talking about some stupid little promissory note.
Adultery is a Class 4 misdemeanor in Virginia as well, where a legislative panel recently rejected a bill to decriminalize the act.