It definitely seemed to ramp up at the point where my own bff got fed up with my wife's bff (his STBXW) and her crap and said "see ya" and took a sabbatical (he owns his own business) to Florida... Where he promptly began a relationship with my W's BFF's AP's W. (follow? This set off a real S-storm, and my W's BFF, who just a week before had been saying how "amazing" her STBXH was being through all of this (all of this being her sleeping with his then-best-friend, indicating she was going to run off with him permanently, and oh by the way I'm taking the kids to Florida) then started throwing a continuous temper-tantrum and trashing my friend (and his friends, including me) to anyone who would care to listen.