Peggy & Mary
"It's been rather exhausting. I've never been terribly good at comforting." That was one of the hardest parts of her job. It wasn't that Mary had no empathy for others, but sometimes the job required so much that it was exhausting to her. She wasn't naturally a comforting person.
"As for myself," she continued, "it was hard having Tony leave, but it happened at the same time that Howard and I happened to get together." Here she smiled. "So in that sense I've been very happy."
Mary wasn't going around telling everyone about she and Howard, but she figured that Peggy of all people could know about them.