Rebids by Negative Double with a fit
If opener supports your major, you add your points to the points that opener shows. If you know that you cannot have 25+ points combined, you pass. If you know you have at least 25 points combined, you go straight to game. She who knows goes in bridge. If you may have enough for game if opener is at the top of her range of points, then you invite her by raising to 3 of the major.