Up until now we've only shared her with friends. Our first was unplanned with a friend of us. The second also unplanned, and ended more than 4 years later.
But, our last one was with a third friend (ex co-worker of my wife that became our friend after he left the company).
That one was planned, but ended terribly (he was an ass and behaved like one so we cut him off).
So I can say that involving a friend, the right one may give you a lot of joy, but if it goes wrong you have more risks of it seeping into your private life.
And of course you can lose a friend...
But, our last one was with a third friend (ex co-worker of my wife that became our friend after he left the company).
That one was planned, but ended terribly (he was an ass and behaved like one so we cut him off).
So I can say that involving a friend, the right one may give you a lot of joy, but if it goes wrong you have more risks of it seeping into your private life.
And of course you can lose a friend...