Well, are you? Has parenthood changed anything about your level of selflessness?
Personally, I'm not. Not by a longshot. I would do anything I can for my son and the people I love and call family, within reason. For other people, not so much. If someone asks me for help and I can do it without going too far out of my way, I will unless I'm in a particularly bad mood. But I would have to be very, and I mean extremely, touched or upset by something to offer my help. Or somehow figure a way to profit from it.
It was different when I was younger. I used to be a bit of a people pleaser, and I didn't even do it because I genuinely liked helping people but kind of on auto-pilot. Until I realized how ridiculous that was and how much time I was wasting on something that only left me thinking about how much time I'd just wasted on people I don't care about and that was the end of it.