[header] How to massage your pregnant wife [title] Learn about the floor technique, which is preferable to a mattress because it provides a firmer surface. [substeps] Position 2 pillows on the floor to resemble an arrow point and have your wife lie on her side with her armpit between the 2 pillows. Allow the pillows to support her stomach and back. 
Place a pillow or two under her head for support of the neck and for proper spine alignment. Keeping the bottom leg straight, bend the top leg and place a pillow or two under it.