Unwritten Rules

Acquaintance made through common friend;
seat occupied in that friend's stead;
unwritten rules that flex and bend,
became brittle with the go ahead.

Unaware of what was to impend,
impaired, the duos' morals fled.
An act ensued that few commend;
affection thrived with little said.

Fortunately, they'd transcend
a love affair begun in bed.
Made a pact to start a trend,
to compromise and forge ahead.

Tightly knit, no need to mend,
a relationship of flawless thread.
Unblemished, left without loose ends;
woven, so as not to shred.