Make a quiet entrance and exit. Sit on the back row.
In and out, if it makes you feel better to go.
Teddy,
I disagree. I would go in, talk to the family of the deceased and then leave. Make your presence known.... I would ignore OM/OW and any drama..... It is about doing the right thing (again) and being the bigger person...
RMG
"The bad things in life open your eyes to the good things you weren't paying attention to before." from "Good Will Hunting"