<human>: Can you condense the text into three sentences or less?

Ill try to keep this brief. Last year my girlfriend mentioned, while buzzed, that she would want another girl in the bedroom with us. Not for me though. So she can experience a girl going down on her. I joked how I would be involved and she said maybe there would be some rules involving, well, involvement. Months later, she makes the same comment and reminded me she brought it up before and is still interested. The question is.... How do I go about this situation? She would never confront another girl to be involved. Should I? Is this some sort of test? She doesn't normally do these things, but she is a great time in the bedroom.

I think shes serious and I want to make this happen for her without anyone being uncomfortable. Help? Haha.
<bot>: GF may want a 3some. But for her pleasure, not mine. She get jelous. Best way to handle this?