[ Her nudge and wink warms his smile, even if the compliment colours his cheeks, grounding him in this happy moment instead of the empty space where Harry had been. The answer to her question comes easily, a cover story the Galahads perfected and shared, hewing as close to the truth as possible. ]

He knew my dad, when they were both in the Marines.

[ He leaves out the details of the relationship not for the sake of secrecy, but to maintain the breezy mood of the evening. Mentioning that Harry was there when his father died, that he delivered the medal of honour to Eggsy's home in person — that's information he would give Peggy freely on any other day. ]

And then he helped me out of a tight spot, as a favour to the family. We got closer after that.

[ All true, but all oversimplified in this setting. He wonders how much Harry had revealed of himself to Peggy and how much she surmised with all her cleverness. ]