Btw - I like to use this excuse.
“Look, would you rather me go under the knife or something? It’s not like I am getting implants or something, I am doing manual exercise techniques to try and enlarge my penis, not taking some magical pill or having a doctor cut me open”
I am sure if there was a way your wife could get bigger tits by massaging them and stretching them versus having saline bags stuck in her chest, she would.
You can always use that route :)