You are obviously not at fault.omg the drama! It's Dickensian! The puts traded ITM and I am at fault? lol fucking bill me.
You were long the synthetic 10/20 call spread. If none of that makes sense or matters to you then stop what you're doing. The puts were five bucks OTM after earnings so yeah, not a high probability scenario. You bought them as prot and then let them die.
You could have quoted XYZ 110P and the answer would have been the same.