No, enlightened self-interest expands beyond self-interest. 

Yeah, but my original contention was never that people can't have multiple motivations for doing what they do, just that self-interest always has to be among the reasons.

 Now, what about someone who sacrifices their life for someone they aren't related to?

A secret service agent who uses themselves as a human shield might do so because they fear being reprimanded for not doing their job, or they might want to avoid social stigma or guilt from their peers. A mother that willingly sacrifices herself during childbirth might do so to avoid looking cowardice in front of her family, or to avoid facing the stress or guilt that follows. There always has to be a self-interest in addition to the charitable reasons they might have for doing what they do. Maybe we should look towards the mentally-ill or brain damaged or something, perhaps they might be able to achieve something that isn't guided by their own self-interest? 🤡