You don't. Shepard considers leaving it at that. But something brings her up short with an unexpected sense of shame. When Thane had died, no one had mentioned it, not for months, and it had been Kolyat of all people who took the necessary steps, while she'd been... doing what, exactly?

"I, uh... I don't know. Mostly I just drink too much. I skip sleep, maybe I get a little more stupid in battle than I should. I'm known for a risk-taker, so I don't think anyone really notices," Which was an ugly sort of thing to think, about your best friends in all the world. Shepard looks down at her glass— empty— and sighs, "I never expected to live this long. I was actually kind of hoping this last big push would finally be the one that killed me. It's a war. People die in wars all the time. Oh yeah..."

She turns away from what Garrus would call contemplation and Joker would definitely call teenage brooding, and offers Wei Wuxian a sharp, toothy sort of grin.

"And I hunted down the son of a bitch who killed him, and cut out the bastard's heart."

That day, had been a very satisfying day.