Well..... it's possible because some genes mask others. (on a side note, it's very interesting that all of the boys were orange tabbies... the father's genes for coat color didn't affect them at all, because the orange tabby gene is on the X chromosome, which they get from the mother)
OK, so back to the subject... Stormy has the orange tabby gene on one of her X's, but she's not an orange tabby because that requires the gene on both X's... basically orange tabby females have to have both parents as orange tabbies (or the mom can be a tortie or calico... but i won't get into that). So, since she only has one orange tabby gene, other genes can mask it, in her case, the gene that gives her the points. So the father probably gave that gene to Stormy. He most likely is not an orange tabby, because if so Stormy would probably have been too, because she would have had orange tabby genes on both X's, and as we see with the boys, if the cat is homozygous (which kinda means "pure") for the orange tabby genes, it masks the other genes. But with just one orange tabby gene, and one gene for who knows what else, the pointed gene masks the orange tabby gene.
(just re-read and realized how confusing this sounds, even to me... and i wrote it! but i can't figure out how to explain it better, sorry... tell me if there's something you need clarification on