Would you be mad at your husband?

So say your husbands baby mama came out as bisexual 2 years after he got together with you. And he was super upset about it so you read his text messages with her. And you saw he said things like " this explains why I thought you were faking your orgasms" and then he went on to say right after that " I blame myself". Do you think that's a little extreme. As his wife I feel kinda disrespected that he's trying to talk about her orgasms...... like why? Help???

I forgot to add she told him when she was with him she wasn't as drawn to girls....