It little commented or sermonized upon that Jacob's firstborn son Reuben lays with Bilhah, his father's concubine and the maidservant to his aunt Rachel. I have it on good authority, however, from a learned biblical numerologist and part-time hermit, that buried herein these passages is an ancient and potent curse cast upon Reuben such that he would evermore be known primarily on account of his namesake sandwich.
In other news, Rachel dies in childbirth and Isaac dies of advanced old age. We also get a handy list of all of Jacob's twelve sons. Here they are in illustrated form.