I don't know that this will help, but I have another perspective. I think it's wonderful that your children feel safe enough to BE dramatic in your family. My family wouldn't have tolerated any of that behaviour out of me. Drama AND feelings, basically not acceptable; especially if they were contrary to the prevailing whatevers (feelings, environment, decisions).
I remember lots of my parents friends, my mother loved to entertain, and was likely an extravert. Many years later, I learned that lots of the women who came to dinner, one with whom we were close (went to the cabin, she gave me presents) were more than friends. My parents weren't exactly poly, and I'm fairly certain there wasn't too much ethical going on, but there were definitely things going on that I'm happy I didn't know then.
and, the talk of PDAs reminds me of one of my happiest memories. Found my dad in the living room and he just looked all high and dreamy. I might have asked, but he said, 'your mom just kissed me *sigh* and she was wearing the lipstick she used to wear in high school.'
Even then, when I thought kissing was basically gross, it made a huge impression on me. I hoped one day some man would be that silly over kissing ME.
Love is that condition in which the happiness of another person is essential to your own...
Robert A. Heinlein
Me: female, bi, (formerly hinge of a vee)
with FirstBoyFriend (FBF)(moderately long-distance)
and no longer with CurrentBoyFriend (CBF)(who lives in the apartment building next door)