Raising children is easily one of the hardest things to do in this world. You have living parasites roaming this earth, depending on you alone at first. While that sounds scary, it gets better with time, They grow up, have their own families, and continue their legacy for the foreseeable future. Do I have any experience in this? Hell no, I just watched rugrats and Fresh Prince of Bel-Air like the rest of us. I'm only sharing cliff notes.
The struggle with parenthood isn't the children themselves, it's how you handle any situation thrown at you by the children. You either discover the correct way to deal with things or the incorrect way of dealing with things. If you're debating which one you should be doing? Please, Seek help.
I can only imagine my family in the future, I find a lovely partner, We grow together, have kids, dogs, and the whole standard throw-up-in-your-mouth charade. I've also thought about having or being with someone who's possessed by an ancient demon seeking out my soul until I give in. I could fight it, hire a priest, gather some sage, hell even conjure up another demon and request a duel like it's some sort of evil battle-bot throwdown.
I couldn't imagine trying everything in my power to relieve someone I care about of said evil entity. The movies are too easy, I don't have a rocking iron chin, and My six-pack is non-existent, so I couldn't kill it with my striking dapper looks, Maybe I could flashbang it with my grotesque appearance. I'm only half joking. I would hire as many priests and grow endless pots of sage to save my family.
I wouldn't however, Disregard my partner's worries regardless of how crazy they sound. If you trust them, then anything they say should hold some weight. You also shouldn't accuse them of heinous acts because weird coincidences occur. It doesn't help either if you're a psychologist and/or a priest that can't see the pure evil right in front of your eyes.