I believe you're still expected to be celibate once taking your vows.
Nor are they expected to refrain from sex within marriage, which may be what you mean.
Of course, if a married Eastern Catholic priest decided to join the Latin Church with the rest of his family, this could happen too.
But generally, a married man will want to discern the diaconate, as the priesthood will simply be out of the question, except in these exceptional circumstances.