I personally believe we have a moral obligation to help anyone and everyone, if we can do so without damaging ourselves or others.
That doesn’t mean never saying no, it doesn’t mean not having boundaries. It means being aware of our own limitations and our capacity to help others, and actively doing so where we can.
For some people that’s giving money - to charities, to people in the street, to family. An amount they can afford and feel ok about giving. For some people that’s opening their homes and lives by fostering (children or animals), for some it’s volunteering. For some it’s becoming a voice, an advocate, whatever. And some people are drowning in daily life and have absolutely no capacity to do a single thing more for anyone else. And that’s ok too.
I do not think we are obliged to help anyone purely because they are related to us. And I do not think we are obliged to destroy ourselves or our nuclear family by putting others first.
Example - if my cousin’s children were ever to require an alternative place to live, I’d squeeze them in somehow. Because I can. Because family is important. And because I have the necessary skills involved in parenting traumatised children (hypothetical cousin; as far as I am aware, none of my relatives are currently in this situation). But I’d find someone else to care for the dog. Because I can’t. My friend however would take the dog without question, would take on a “concerned adult” role for the children, visit them regularly, advocate for them to be kept together, become a memory holder for them, but wouldn’t be able to take on a full time parenting rôle.
If I knew that someone was suffering, I would want to help. But, if that person was someone with whom I had had a long and toxic relationship, that help would not involve me becoming a hands on carer. Boundaries. Oxygen mask on first. I might decide I was willing to shop once a week. Or I might decide even that level of contact was detrimental to my own mental health, in which case I might limit myself to ringing social services and the GP and ensuring that the relevant authorities were aware of someone in need of urgent help.
When my niece needed money for an international activity, I was happy to donate towards the cost. But I wouldn’t have sold my car in order to fully fund it. Gave a little more than I would have given to my friend’s child for the same trip, but not because I believed I was under any obligation to do so. Just because I wanted her to be able to have that particular experience, and I wanted to be apart of making it happen.
Is that the sort of thing you mean?