Is having this kind of threesome normal?

So...
Yeah.
Me and my boyfriend were talking dirty in front of one of our friends who's a girl.
I'm bi.
And I like her.
So the convo got to be pretty heated.
She said that she wanted to have a threesome for her birthday, which is in April.
She is gay, but wants to try straight sex.
I have no problem with this
Except...
Is it normal that if we end up doing it, I don't want to be pleasured?
My boyfriend is a virgin, and I don't mind if she and he lose their v cards together.
I'm not a guy or girl virgin.
But I want to pleasure him and her,
He wants to pleasure her and me, even tho I told him I don't want to pleasured.
And i dont know who she wants to pleasure because we didnt see her after we talked about it. But i think she shouldnt do the pleasuring.
She also said she has never been the dominant one in her realtionships
And in my girl girl relationships i was always the dominant one
So i think she'll like that
Shes into S&M
He's fine with me being like that.
I think it should be all about her
And I personally get more pleasure out of being the pleasurer than being the pleasuree.