Other than not sending one at all, there is no guarantee you can prevent it from being shared with a wider audience than you initially intended.
Remember; you don’t have to do it if you don’t want to, and should never feel pressured into it.
No matter how much you like the other person or how much pressure they put on you.
If they respect you, they will completely understand, and if they don’t understand then they’re probably not worth your while.
But there are also many cases where something that may seem like a bit of harmless fun at the time ends with regret.