Be aware, these execs may very well be egotistical, narcissistic pricks. If they're talking about it on Twitter, they may view the email as a personal attack, an challenge to their credibility, and an existential threat to the company they've built (who wants to end up like Travis Kalanick?). Do you want to fight a PR team?
Alternatively, you may post it and nobody will care. It becomes an example of your impotence, and a potential red flag for her future employers. Do you want to try to explain why nobody gives a sh*t?
Her name is attached to that email, no matter how you leak it. It's her call.