Emerald,
I don't think its wrong at all to feel like you wish you were the daughter she was doing things with. I had some really strong reactions to my T's last vacation part of which was the frustration of knowing his family knew him in a way I couldn't and how much I longed to be part of a family like his (which I have a tendency to idealize, but my T certainly recognized where the longing was coming from.) I've talked to him about wanting to be two years old so I could climb up in his lap and experience a safe embrace, I've talked to him about romantic/erotic attractions and even recently, how much I regretted the boundaries because a discussion came up in a couples session with my husband about a subject I'm really interested in in which my T has done extensive reading (he's one of the most intellectually curious people I've ever met which I find extremely appealing in a person). I told him at our next session that as much as I am grateful for the boundaries and how much I understand how necessary they are to our work together, I just wanted to crack open a couple bottles of red wine and talk for a few hours. I have even told my T that I loved him (in a non-romantic sense). Every time I've expressed any of these emotions or longings he has been completely accepting and understanding of my feelings. Working through how I feel, what I long for and why has been a really important part of our work together.

These feelings are happening for a reason and are a sign of a healthy reaching out for relationship. Talking about it with your T would be a really good thing.

AG