Husband feeling unsexy now

It's been hard since we had a baby. I'm going through postpartum depression with a colic baby and my husband started wetting the bed again. He used to before because of trauma and it's started all over again. We don't know why and he's discussing it with his therapist. The deal is when I finally get to sleep he will pee all over me and when he would wake up to change the sheets he would wake the baby. I finally asked him to wear diapers to bed and he said okay and he was sorry and his voice choked like he was trying not to cry. I went and bought them for him to save him some humiliation. Since he started using them, self esteem is in the toilet and I feel horrible now... I've been dealing with my own stuff I forgot he's struggling too. He sleeps as far away from me as possible because of how embarrassed he is. How can I show him I appreciate him making my nights easier and I still find him sexy?