He had a boner and our toddler was on bed

Is this normal for a guy to be hard w his daughter on the bed. ??? We share a room w our toddler and I put her on the bed w him bc he was asleep I went to study in guest room and he calls my phone saying she’s up and she’s crying for me. But I put her back to bed and I saw his boner and I felt it. Our daughter is in the middle of us sleeping. I asked him why he was hard he said “idk” and tried to go back to sleep. I asked if he can sleep on couch tonight bc I didn’t feel right. What should I do??? I asked my 2 year old if her dad Changed her diaper she said no.