Big sister and little adopted sister

Yes it's canon that van and nat have kids well for vallia at least but idk for the other one new adopted kid's nickname is nan nan (a play on nat nat which people do call me ;w; ) i couldn't come up with a actually real full name for her so I'll call her by her nickname. Nan nan is like 1 or 2, she has semi light autism, she rocks back and forth like her mom nat (lol she influenced her to do it also the rocking is not part of her autism), she's a crybaby and wants a lot of attention (like nat/me :3), yes she does wander off and gets lost but her older sister follows her and makes sure they get back.