Rachel and Yule were naturally shocked that Quinn would call the Rejuvenation Pills Charlie's dowry, while Charlie also felt a little embarrassed.
But in this situation, he knew he shouldn't say anything, let alone correct Quinn.
If he kept quiet, Rachel and Yule would take the Rejuvenation Pills without qualms, and everything would be more or less resolved for now.
Naturally, Charlie intended to keep dragging this engagement issue as long as he could, just like an ostrich burying its head in