Dribbing cum

So I fucked my bussy with a glass dildo and got to the point but not over it into sissygasm.

It felt as good as cumming from my clitty but I felt I was at an edge and not going over it. My clitty just lay limp, then I noticed more precum dribbling but on closer inspection it was actual cum. I dribbled only a little bit.

Did I sissygasm?

If not, what is holding me back?

Any ideas?