The Concept of an Isekai Family is oddly funny to me.
Dad: Ok. So you appear in another world, the first thing you're going to want to do is avoid the opposite Sex. Especially if they're already acting like you're a couple without even having a conversation with you.
Child: What? Why?
Dad: If you hang around people like that, you'll build a harem that'll spiral out of control.
Child: But aren't Harems kinda coo-
Dad: NO! They're fetishezed troupes and cliches that degrade the experience of the story and rip you away from the excitement of exploring a new world.
Mom: Don't listen to your father, your Harem members will be stupidly OP and will become your first line of defense against anything that reality has to go against you. Even if you or them should die to common sense, you specifically won't due to plot armor.
Child: Wow! That's amazing-
Dad: You forgot to tell am that they will never have sex and will struggle to just hold hands.
Child:...Huh
Mom: Why must you reduce a Harem to just being about sex-
Dad: BECAUSE THAT'S THE FUCKING POINT!!