Sick and tired

Cut a long story short, my partner has been unfaithful and disloyal. Found out he cheated and messaged multiple women (also during my pregnancy). Now I’m trying to work things out for our family as there is now a baby involved. He went out today and now that I’ve lost trust in him I checked his iPad he left home to see if he went where he said he was going and it turns out he is there and has also called me. He realised I went on his iPad and asked me if I did. I was honesty and told him I did and the reason why (idgaf I have nothing to hide). His response was “wtf, that’s weird” I’m fucking fuming. The audacity 🤢. Is what I did truly weird or do I have the right to feel disgusted with his response?