If you have four small children, they give you so much emotioal contact that you do not need much more. Was it the same before you got the children? Women have to be aroused by courting in order to appreciate love. Often married men forget this and expect their wifes to be as easily aroused as they themselves are. There is a risk that you husband will find someone else, if you always makes him feel disappointed. On the other hand you cannot force yourself to do things that you do not like. Give him as much as you can without betraying yourself. Maybe a baby-sitter and some time on your own would help.
Teach him to arouse your feelings before lovemaking. Read more!.