I'm a woman in a new relationship with a transgender woman, and we recently became intimate. Part of this includes me sucking on her nipples. When I did this, I noticed a salty fluid coming from them - not a lot, but quite clearly lactation of some sort. She has only been on her testosterone blockers and estrogen for about a month, and has only a very slight change in her breasts so far. What could this fluid be? Thank you for your time.