Selfish not. I think you did the right thing. I'm sorry in my opinion if you have the bolt of fabric in hand, unless you state otherwise the first cut should be yours. Like someone else mentioned, there maybe a specific section you want of the fabric because of color or design. I've done it to, not allowed someone to have the bolt till mine was cut, good job for standing up for yourself. Sometimes the bolt may look like there is plenty but that doesn't always mean there is. Oh and I think the cleark should be the one to make that suggestion, not assume your willing to risk not having enought after the other persons cut.