Considering that at the beginning of the history tell us that were patchy and Marissa who led the attack to the family of Meiling, i can say that karma has come to pass the bill for their acts
An easy way to assure that your mate doesnot betray you like that is nail their feet to the ground. THEN, you pull out their teeth and rip off their tongue so they don't say any hateful things to you or scare your children. Then, you tear their eyes out so they can't glare at your children angrily, scarring them! Of course, you do this out of love. Of course.
Despite what she said, Marisa is not a Yukkuri that would be fine with dying in a place like this. It's infuriating to be done in by a dimwitted Meiling, but the situation now is not one where she can retaliate. Yes, she thought, she should inform some other group of the danger posed by this Meiling and let them deal with her. Marisa aimed for the exit of the cave, desperately running while contemplating such things.Patchouli: "Don't be so selfish, Marizaaaaa!!!"Marisa: “You’ll be dying on the behalf of Marisa, so Pachouli should also be happy daze!”Surprisingly, Marisa seized the opportunity while Reimu and the others were being killed, and fled, abandoning her wife Patchouli and the children. Along the way, she crushed several of her own children, but such things didn't matter if it meant she would survive. And just like that, the bond between the married couple (lol), who had vowed a future together, quickly crumbled away.Patchouli: "Mukyu!? Mariza!!! Wryyyy!!!"Marisa: "Yu–!!! Now, while there is still time, Marisa-Sama will be escaping ze!”