Hi birdpumpkin, no I wouldn't say you were being selfish at all!! Maybe more underestimating the bonds/connection you are making with your mom right now.
It's easy to think that we should be doing more (and it is really nice that you want to do more!!) but I'd say what you're doing now, being there for her/around/doing what you can (whatever that is!) at a time like this easily matches some of the things you feel you should be doing for/with her.
It will be really good when you get to do some of those other things with her when she's feeling better, but right now this is just as important. And real kudos to you for what you're doing!!!
And the hug with your dad ( ) sounds like quite a breakthrough!!! Communication may not be so easy with him if you're closer to your mom, but maybe try to fill some of those silences by asking him questions or just telling him about day-to-day things, or what you or your son have been doing- might encourage him to open up a bit more???? Great ending to the visit, though!!!!
Alison