In response to many forum member's questions regarding maternity clothes that fit moms of multiples, I wanted to let you know of an option I found.
I gave birth to boy/girl twins in September and I bought maternity clothes from formultiples.com. It was the only company I could find that offered maternity clothes for mothers of multiples. I was HUGE so I was not sure they would fit. They fit great. I was almost 50" around the belly when I delivered at 37 weeks. The pants covered my belly without cutting into me and the shirt had plenty of room in the belly and did not pop up in the front like most of the maternity shirts I outgrew. The fabric was really comfortable and light. I could have slept in the shirt.
Hope this helps.