Her face falls. She doesn't and won't try to admonish guilt, because Peggy knows it won't do any good. She's grappled with similar feelings herself, over accidental casualties and assassinations alike. It's a personal struggle, and there's very little she can do to appease it.

She just pulls Steph even closer, plants a gentle kiss on the top of her head. "You're still not a terrible person. If you believe one thing I ever tell you, let it be that."