Can phone clone transfer whatsapp messages to another device?

@SophieCooks …sorry if this is a bit basic, but as an older parent I get a bit lost with all this.

You’re saying there’s really no “invisible” way to keep a live copy of someone’s WhatsApp without it showing up somewhere on their phone… is that right?

I was wondering… even those “monitoring” apps people mention, would those still be risky from a legal point of view if the other person doesn’t know? I’d hate to see someone in a bad marriage situation make things worse by accidentally breaking the law…