Prob cuz he didn't get an omega repeatedly thrown at him during his ruts that he'd usually spent with mc
Like he wouldn't suppress his rugs
He was technically taken advantage of under the influence
Mostly due to his father and the pressure of continuing the line. He needed heirs and past El was a beta
Because pulling out during regular sex is toootally the same as getting locked in with a heat induced omega during a rut. Not to mention that psycho father most likely drugged Fenrir.
if Sion can manage to gather his wits and suppress his ruts purely just because of his undying love for Elle, why can't Fenrir do the same? i really hate the Duke for this!