I find it interesting that your husband doesn't want to go alone because "they" (the congregation) make him uncomfortable with all their questioning about your absence. On some level, he is sensing the judgemental attitude of JW's and know that their acceptance of him and your daughter is conditionally based on you all keeping up appearances in the congregation. It is not a supportive place for him to find comfort at the sadness of his wife no longer believing.
The bottom line is: You are going to have to make a choice if you want to spend the rest of your life spending a lot of time living a very time and energy consuming lifestyle that you do not believe in, just so your husband doesn't experience any social discomfort at the hall.
As for your daughter's friends, their parents will stop their kids having anything to do with your daughter at the first hint of you being an unbeliever. I know this, as I had 20 year friendships, with children whom I was present at their birth, no longer able to come to my house and associate with my son, and I was not even df'd or reproved, only inactive.
Childhood friendships are based on shared activities (such as school, church, sports, etc) and often do not last when the shared activity is over. Your daughter can find friends anywhere and candy grandma's are pretty easy to find too. I'll bet there's a few right in your neighbourhood. Or, take her to an old folks home for a visit and she will have no shortage.
In my opinion, those are no reasons to live a life you don't want. However, if you're husband still wants to go, then I suggest to make it more comfortable for him, you don't spread your doubts and opinions around the hall. You will get df'd for that. But if that one sister tells the elders on you, you can just tell them that she started the conversation with her remarks about the questions from readers and then you felt free to confide something you didn't understand. Keep it on the "doubt" or "don't understand the logic" level, and they won't df you. If you act like you "know" for sure it's not the truth and try to convince anyone else, then they will df you.