Hello there,
I have only done the 7 year deal once and my husband actually cheated...he was the one with those feelings and I was the Stay At Home Mom with our two kids. But what I am wondering is, did this feeling just happen recently? Was it in the back of your mind for awhile? Or, are you dealing with the depression of losing your dad still? I know this is off the topic, but your mom is not the only one who may need someone as you seem to see it. Your husband could win husband of the year, your children could be flawless, and your marriage perfect...but what are you feelings about your family? The family that made you and grew with you, your mom and dad. Yes, you may think you got over it or are dealing with it as to be expected and doing well, but have you talk to someone about it. Your mom? Your husband?
If you want to stop the sex, because you are not feeling "it" anymore, try excersie (it can help and if you like find an all women gym). This might sound dumb, but start loving yourself a little. Go to a spa once a month, if the budget allows. Take a weekend off once a month if you can and also, ask your husband, if possible, to massage you at least twice a week. Put the kids to bed, turn on some soft music, lower the lights, and get the lotion out or some oil. This should not be a sexual act, just an act of love and self beauty. He could do a full body massage and yes, he might not get it right the first couple of times, guys are sometimes clueless...but help him along and don't get upset, as long as he is giving it a shot. You have hit a moment where you question everything, even throwing your husband a few question he doesn't think of because you think he deserves better. Girl, if you are married this long and you don't fight over the number you found in his wallet or why he has a "mark" on his body, then he made the right choice when falling love with you. Is this normal? yes. Do you have a right to question everything? sure. Should you talk a little more and take more time out for yourself? damn right! Love yourself a little more, talk about your dad's death, and take a break from the norm...one step at a time, you didn't get to where you are overnight so don't expect to feel super better right away...Good Luck and remember everyone can tell you are a beautiful person, but you have to truly see it in yourself to be happy.