second mom

I feel like an imperfect parent. Of course, we all are, all the time, but tonight especially. Because we discussed adoption, and my answers feel so inadequate. E asked, for the first time, why her birth mom couldn't take care of her, and I couldn't give her a very satisfactory answer. I tried, but I know there is no answer, really. I don't know, and I don't want to make something up, but it feels unsatisfactory.