Well, death threats might be a slight exaggeration, but Bryan's mom did tell Rachel that she'll "kill" her if Rachel makes Bryan unhappy.
Mama Bryan's exact words were,
If he's happy, I'm happy. If not, I'll kill you.
Uhhh, OK there, mom! Even though it was played off as a joke, and Rachel laughed when she said it, it was still rather unsettling. Fans on Twitter are definitely see it as a red flag.
It was something of a rocky meeting for Rachel and Bryan's parents. There was already a lot of pressure, especially considering Bryan told Rachel that his last serious relationship fell apart because his ex had a bad relationship with his parents. Rachel admitted that pressure was making her extremely nervous for this homecoming.
Things started off awkward when Rachel and Bryan walked in. Rachel had a tense conversation with Bryan's sister in which the sister explained the mistakes Bryan's ex made led to her "demise." (Bryan's sister has been watching too much Game of Thrones, I think.)
Finally, it was time for Rachel and Bryan's mom to have a one-on-one conversation. Rachel totally sang Bryan's praise, and Mama Bryan answered with the following warning:
I want to warn you that you'll be marrying the whole family.
What she meant was, Bryan was extremely close to his family and his mother in particular. I guess that's a fair warning to give to a future daughter-in-law, but still, it was a little intense, especially since it was quickly followed by that "I'll kill you" comment.
Still, in some ways, it was actually kind of sweet. Mama Bryan teared up when she was talking about how much her son meant to her, and how much she wanted him to find love. She told Rachel she prayed at mass that Rachel was "the one" for her son.
So at least Bryan's mom is rooting not to have to kill Rachel! That's... something.