Artist wrote:

おめでと、咲夜

レ「今夜は祝杯ね！活躍を期待してるわよ、咲夜」
咲「有難うございます、お嬢さま」
美「咲夜さん、まだブランクで体が動かないでしょう
　　もう少し運動にお付き合いしますよ！」
咲「…貴女結構タフね…」

Congratulations, Sayuka.

R: "A toast tonight! I look forward to your efforts, Sakuya."
S: "Thank you very much, Mistress."
M: "Miss Sakuya, you're not on duty or moving yet, right? Let's get together for a bit more exercise!
S: ".... You're rather tough, aren't you..."

Moonspeaker said:

M: "Miss Sakuya, you're not on duty or moving yet, right? Let's get together for a bit more exercise!
S: ".... You're rather tough, aren't you..."

This makes a lot of sense if post #1415544 is the "exercise" Meiling's referring to...