Sorry to post in AIBU, but I would really appreciate some advice. So my sister in law's son is 14 - his Dad hasn't been on the scene since he was 3 and was abusive. My SIL has 3 older children from a different relationship - they are all adults and have moved away.
From ever since I can remember DN has been desperate for his Mum's attention - and she has always treated him with contempt, or simply completely ignored him. She has suffered depression, and definitely struggles to articulate her feelings. She had DN when she was older (having had her first child at 19) and I think she resents him to an extent. She has always gone out 3-4 times a week to do a hobby and DN has been left alone since the age of 7 or 8 - we only recently discovered this from his adult brother recently. DN was a lovely sociable child, very chatty and affectionate, but since about the age of 9 or 10 has become withdrawn and now just plays computer games up to 10 hours a day, and often through the night. Since lockdown he hasn't been outside in 3 weeks, and hasn't washed during that time - I know this because his Mum tells me, as though she has no power over this. I appreciate I can't judge, I am not a mother to teenagers. We have tried to talk to her about it, but we risk completely alienating her and losing all touch, which would be the worst for DN, it is a delicate situation, which I am unlikely to be able to convey over mumsnet.
I can see that DN is probably suffering depression and being off school and away from routine is really having an impact on him. I would like to engage with him, and show him he is cared for - but I don't know how best to engage with a teenager - or even encourage him out of his room. Before lockdown he refused our invites, won't respond to messages - regardless I keep trying and have sent him care packages over the lockdown period - but I would really appreciate some advice on how to engage with him and try to show him some love.