http://www.usmagazine.com/entertainment/news/george-rr-martin-red-wedding-hard-to-write-fans-swore-off-books-2014244
As etched in the minds of heartbroken readers and viewers forever, the wedding in question saw the surprise slaughter of two beloved protagonists, Catelyn Stark and her son Robb Stark, King of the North, during an already-tense wedding
As Martin, points out, the HBO version, from 2013's season 3, "turned it up by 11" by adding one more victim to the body count: Talisa, Robb's pregnant wife. "The TV Red Wedding is even worse than the book," Martin said, "We get a pregnant woman stabbed repeatedly in the belly."
http://awoiaf.westeros.org/index.php/Jeyne_Westerling
I may be thinking that the "enemies" are worried that she is pregnant.