Offspring
When Garrus told Shepard about finding out what a turian/human baby looked like once the war was over…well he wasn't kidding about that either. They'd done the impossible before so why stop now. Especially when an opportunity came about.
The salarians were the ones that presented said opportunity. In a way, it was their way of saying 'sorry' for not providing 100% of their fleets during the war. They promised to do any kind of favour for Shepard and Garrus. Anything.
So, with incredible thought and discussion Shepard gave in and agreed with Garrus. They'd go to the salarians and begin testing so that their biology would allow a little child they could call their own.
Even with her doubts, Shepard couldn't help but feel just a tad excited.