Secret
The obvious caveat here is that Secret is filled with lies and fakes - so it may all just be a joke.
The post has received 20 comments and more than 800 "likes" so far. "Suspense is killing me," says one. "Omg do it and update the thread!" says another.
Secret works by showing users only posts that come from people on their contacts list or friends of those friends. All the comments are posted completely anonymously, and unless a user calls out their own identity specifically there is no way to tell who is saying what.
And of course users can claim to be other people, and there is no way to figure out what is real and what is not.
Thus Secret has already filled up with a fair amount of narcissism and lies.
Nonetheless, we'd really like to know if Michelle says yes!