Because Hux can't be the only one that gets to have xeno fun! Give me Kylo getting his brains fucked out by all kinds of strange and wonderful apendeges.
+multiple species
++++ straight up gangbang
+he ends up completely wrecked by the end
+++tentacles
+++++++Kylo ends up with a species significantly larger than he is
++++his human features being fetishized
++++++++large insertion
+Hux finds out

Eggs optional but if you want to include them feel free.