My spouse's promiscuous friend nearly causes a fire while I'm away

When my spouse and I decided to take a break and head out for some shopping, we left our trusted friend in charge of the house. Little did we know, this was a grave mistake. Unbeknownst to us, our friend harbored a deep desire for each other, and the moment we stepped out, they let their primal instincts take over. The heat of their passion ignited a fire of lust that nearly burned our home to the ground. The sight that greeted us upon our return was a tantalizing display of pure, unadulterated passion between our friend and my spouse. The raw, animalistic energy of their encounter was impossible to ignore. As we stood there, frozen in shock, we could do nothing but watch as they indulged in their primal desires. The aftermath of their encounter left us with a burning question - had we underestimated our friend's true nature? Or was this a mere accident, a fleeting moment of weakness?.