Would one crab be enough for two people, or should we take another?

How to say “Would one crab be enough for two people, or should we take another?” in Japanese

In Japanese

二人(ふたり)なら、蟹(かに)は一杯(いっぱい)で足(た)りるかな、それとももう一杯買(いっぱいか)う？

Futari nara, kani wa ippai de tariru kana, soretomo mō ippai kau?

Would one crab be enough for two people, or should we take another? in other languages