WTF helicopter mom?!

TLDR: Nosy busybody helicopter mom thinks two tweens are too delicate to walk a mile home from school and needs to act as personal Uber driver. Wwyd?My 12 year old stepdaughter and 14 year old stepson walk to school together. Sd goes to a middle school and Ss goes to high school. They’re a block from each other.Today my stepkids were a half hour late coming home and when I asked my stepson why he said that it’s because his sister’s friend and her mother stopped them a block from our house and got out of their car to talk to them for a half hour.I believe the mom followed them home. He said she turned her car around afterwards and went a different direction so she didn’t happen to just be driving by.Stepson told me that the friend’s mom was trying to get them to get into the car so she could take them home. They were at the end of our cul de sac. She began to inquire about why they walk home and what our address is. He wouldn’t answer her questions. He explained that she has done this on 3 previous occasions. We stress that they aren’t to get into anyone’s car unless they are a family member or a close family friend.I have never had any interaction with this mother aside from one time when we ran into her and her daughter at a grocery store and she made no eye contact or conversation with me.I feel like it was completely inappropriate for this mom to try to spend a half hour trying to coerce my two stepchildren into her car to drive them home a minute away.She’s made no effort to send a note or contact their father directly about dropping the kids off. She didn’t stop by my house to talk to me about it. She didn’t ask for any parent phone numbers. She didn’t offer him her number so I could call her. Nothing.The kids are 12 and 14. We live in a safe suburb in Southern California and the kids (able bodied) only walk a mile to school.Is this sketchy AF or what?I am SO weirded out by this.Am I overreacting?How would you handle this situation? via /r/Parenting https://ift.tt/2Psawym