How wonderful for you two! And good timing I think.
I birthed our first baby (who is now 17 months). My DP will birth our second. I have been reading a lot about induced lactation. Here's what I've gathered...
The protocol with the highest milk output is to take the birth control pill Yasmin without stopping (no placebo pills) and a digestive supplement called Domperidone (that you order on-line from Canada) for 3 months (or more if more milk is desired - 6 months for a closer to full supply of milk). This builds up the breast tissue and makes the body think it's a little bit pregnant. As far as taking the Yasmin, it is 3mg of progesterone per day. In comparison, women take progesterone suppositories/pills while TTC are usually at a dose of 150mg... so the Yasmin is not "pumping you full" of hormones at just 3mg. Regular birth control pills have 1mg so you want to go for the Yasmin.
6-8 weeks before baby is born, you stop the Yasmin. You keep taking the domperidone and add other herbals such as milk thistle and fenugreek. And you pump at intervals throughout the day. This protocol is said to bring in 50% to 75% of baby's milk needs.
If you as the birthing parent plan on BF... it would be a waste for her to induce that much milk. Because if baby was getting that much from her, then your supply would diminish. So there are less agressive protocols.. which are a lot easier! For example, she could do just the domperidone and herbs and not even bother pumping... but put baby to her breast often for comfort sucking and also supplemental feeding with a Lact-Aid. Adoptive moms with no prior notice of getting a baby have been able to induce a 25% milk supply in this way, with no prior pumping and no hormones. The domperidone and herbs are essential, though.
A great, easy, low-committment first step would be to look at her using your expressed breast milk in a "supplemental nursing system" or "lactation aid". Simpler than it sounds. Basically she would put baby to breast and a tiny tiny tube taped to her nipple would supply breastmilk from a little expressed container. The baby's frequent sucking would induce her breasts to produce some milk (especially if she takes domperidone and herbs). There are some videos of moms using a "lactation aid" on the net. The Lact-Aid brand is about $45.
Even if she doesn't do anything to induce lactation, she could breastfeed baby using the lactation aid and your expressed milk. The little plastic tube is so tiny that she could BF in public and folks not have any idea she was using it. Baby need never have a bottle.
, I have was researching this all week!
P.S. if you do a google with the words "adoptive breastfeeding" you will hit support sites and message boards, etc!