so I have a Question my friend that's dating my husbands brother has a 1 year old kid. but. she lets…

so I have a Question my friend that's dating my husbands brother has a 1 year old kid. but. she lets him sleep untill 7 or 8 pm. and then wakes him up and complains he won't go to bed at 10 pm. and when he's up she puts him in his walker and. is on her phone. she don't even spend much time with him idk what to do it just bothers me. should I tell her anything or just let it go ?