Men don’t typically like being photographed, so when we do get dads willing to come to the maternity photo shoot, we always make sure to emphasize their muscles with dramatic lighting.
A strong light from behind and to the left accents her neck and his core, while a softer light from the far right illuminates the faces and creates the shape we see of the pregnant belly (and the biceps).
On her, solid boy shorts and a halter top. On him, just jeans, though this would also work with a dark tank top (though not as well). Easy outfits for a maternity photo shoot.