Thought I'd reply to you first since I can answer your questions pretty easily. First, yes I think that my wife does get a lot of fulfillment from her involvement with our girls and their various activities. But I wouldn't say that she doesn't also get some fulfillment from me. We have a very good relationship with the exception of romance, and obviously if she were looking for romantic fulfillment I'd be glad to oblige. I've tried very hard to do my fair share around the house and with the girls. But I'm sure there are times she'd disagree. I could probably become "Super Husband" and take care of everything there is to do before she gets a chance to think about it, and I've tried that to some extent in the past, but I think that she'd just take me for granted even more than she does now.
With regard to your question about emotional security, when we first started dating I was fresh out of college and regularly ran around with my close friends while she had a lot of acquaintances but not many really close friends. She seemed to need me more then and was probably more afraid that we'd break up and she'd be left alone. Now, with two kids, I seldom do things with my friends and I'm sure that my wife is fairly confident that I'm not going suddenly leave her. I think that she does still need me to meet her emotional needs through little things like the "I love you's" as those kinds of things seem to make her think that everything is still okay between us. Does that make any sense?