Zeph knew he was playing with fire when it came to Cadet Rena Riley and showing plenty of favoritism to her in both private and professional manners as evidenced by gifting her and Leo by proxy a vlasordon partner worth millions, focused training, and asking her to say the night rather openly.
Half-teasing remarks about making her wait until after graduation to ask him for a baby were also like throwing cylinders of hydrogen into a raging inferno that could burn him considering it was Alorna's attempt at using a child to increase her odds of a permanent relationship with him that caused her to still somewhat hate him.