I’m just curious, by the way, where did you hear that Yosef thought they were B’nei Noach while the brothers thought they were B’nei Yisrael? I thought that was my Chiddush.
I thought it was common knowledge, based on Eiver Min HaChai. (It also makes an interisting drasha on Genesis chapter 44 where for a brief moment Yosef and Yehuda switch their views.)
And thanks for the info regarding a half sibling. I’ll have to look it up, I didn’t know that.