Teen DSC no school, no work, no rules

[Helpingorhindering]

My DSC is “homeschooled” due to leaving previous school. Was on the verge of being expelled and refused to go so DM removed child as was being charged for non attendance.
Since being “homeschooled” DSD has done no key stage school work, has no routine (sleeping at 4am, waking up at 1pm midday). When queried DM doesn’t update on what is going on or updates on new school placements.

DSC at the moment does what they like, often dictates our plans when staying, meals that we have etc. Recently I’ve found DSC will talk over me or interrupt me and DP doesn’t bat and eyelid. The lack of manners and respect are frustrating. I feel like there are no boundaries with either parents.

How do I raise my concerns with my DP without causing serious offence?

This should be reported to the local authority responsible for making sure he's receiving an education. As clearly home education isnt working. Sounds like this child is being neglected and his father needs to take steps to improve things for him. He could seek for him to move in with him if things don't improve.

I reported exh for his fraudulent home schooling of ds at one point.. They cared not one shiney shit he was uploading work from the Internet or pics of Tesco cakes...
Ds saw the light and moved full time with me and went back to school...