Nobody was ever fussed about the abuse side, just that I may have been on the streets with a baby, and I told the council outright that I only didn't want their help because I didn't want SS involved and they weren't concerned that my situation was going to be the same, just with even less support.
Duty of care I suppose.
Similarly, I know for a fact, at least a few years ago, girls under 16 are automatically appointed a support worker once they start seeing a midwife, though every Tattler seems to insist this is absolutely never the case, based on absolutely nothing.
But it definitely is or was a thing around here regardless of your situation, and it wasn't because there's concerns, it's to ensure teen mums were getting the support they needed, appropriate help with claiming benefits, etc. Not saying this is 100% the case with Charlotte, but it's definitely possible.
*there's also no automatic shame in social services involvement. They're there to offer support and try to keep families together and children safe, not rip people apart*