Yes it is fukking wrong of you, you shouldn't have taken him back! for Christ's sakes!!
Pretty sure you already know the answer to that one.
its natural however you took him back. Now comes the hard part, has he proven himself to you as far as trust is concerned and how long has it been? can you live with this infidelity? because as you know you may forgive him, but you wont forget what happened.
I don't think it is. But you should forgive and forget since you did take him back. I know it's hard but you got to try.
The biggest part of love is it's narrative, the storyline which we hope so very hard is somehow central to existence itself. It's difficult not to feel resentment if we feel the storyline has been violated, no matter who 'won'
I feel so bad right now