I think I made my girlfriend’s chest leak milk… did I mess up?

This is really awkward to write.

The other night we were being intimate and I was sucking on her nipples. Afterward I noticed a strong milk-like smell, and there was actually a small amount of liquid.

She acted totally normal, so I didn’t say anything, but I kind of froze because I have no idea if this is normal or if I did something wrong. Now I keep overthinking it.

Is this something that just happens, or did I mess up somehow?Has anyone else experienced this？