apparently, odin and phoenix have a sexual relationship. who knows the details or how long this has been going on. in thor generations, odin and phoenix have a chat and reminisce about their romantic encounters.
rachel never knew who her real father was. she suspected cycke (i still believe that to be true) but then there were rumors of an immaculate conception.
if odin and phoenix continued their relationship into the present, it's possible that odin could be rachel's father after all. it wouldn't even count as a retcon. rachel could be a demigod.
bleeding cool has more info here.
what do you think? is odin rachels dad?
if so, then her battle with thor in avx was actually a form of sibling rivalry.