Matthew Stafford apparently wasn't the only one in his family getting booed during the Rams and Lions' Wild Card game on Sunday -- his wife, Kelly, claims fans also targeted their four young kids with jeers as well.
Kelly admitted before the Rams' 24-23 loss she was expecting to hear it from Lions fans ahead of the matchup ... considering her hubby was their beloved quarterback for 12 seasons before he was traded to the Rams, where he won his first Super Bowl.
Now that he's on the other sidelines, Kelly explained she understood why people would turn on #9 in favor of their own team ... but it's clear she wasn't expecting her youngins to get thrown into their antics.
"It's sports," Kelly said on her IG story Monday. "The city wants to win. Everything is fair game ... except the fans who booed my children."
"Other than that, I loved the atmosphere and the booing just gave my husband more fire."
Despite the booing Stafford's daughters -- who range between the ages of 3 and 6 -- Kelly wished the Lions nothing but the best ... and is rooting for them to win it all.
"The more you love, the more you hate. I consider it all love going both ways," Kelly said.
"I hope the Lions bring home a Lombardi to that city because that feeling is like no other."
This win for the Lions is their first postseason victory in 32 years ... and Detroit will now face the winner of the Buccaneers and Eagles game in the NFL Divisional Round on Sunday.