Pin the pieces together

Place the socket part of a small metal snap against each mark and sew it in place, using strong nylon thread and tiny, tight stitches.

Place the dress face down on this flat surface and line up the back of the cheap sexy lingerie dress with the back of the bra. Make corresponding chalk marks on the inner portion of the back edge of the dress, matching them up to the metal snaps you just sewed on.

Sew on the stud part of each metal snap to the corresponding chalk marks, with nylon thread. Make tiny, tight stitches. Knot and cut away the excess thread. When you put on the bra and dress, snap the two together so the bra does not peep out past the back of the dress.

Pin the pieces together. Use sewing pins or small safety pins to attach the pieces together. Start with the cups, then assemble the pieces of the band. Refer to your old bra or to the pattern instructions to make sure all pieces are in the right order. Compare the shape of the cup to another bra. If you used safety pins, you can try the pinned-together bra on to check the fit. Correct any fitting problems before proceeding.

Assemble the bra. Use small stitches and a narrow seam allowance to sew the pieces together. Make the cups first, then the band. Try the assembled bra on. Correct new fitting problems if they appear. Attach closures to the back of the bra.

Finish seams. You will need to finish unlined bras for greater comfort. Press seams flat, and top stitch the seams flat 1/8-inch inch from the main seam. Sew elastic to the band, stretching the elastic as you sew. Insert the underwire in bras that require it. Your new support bra is ready to wear.
Place one bra in each side of a bra bag.

Pour two to three capfuls of baby shampoo -- or use the recommended amount of a detergent formulated for delicates, if you prefer -- into your washer. Use the gentlest and shortest cycle available on your machine.

After the cycle is done, remove the bras from the bra bag, unhook them, and lay them flat to dry. Laying them on top