Being a parent is hard. I don't have any kids, but I can imagine. You want them to grow up to be responsible members of society and you want to show them the world and keep them engaged but you don't always know what they need or what's going on in their heads. The best you can do is try to keep the lines of communication open, and to always love them no matter what.
Being a parent to an adopted pet is another story entirely. I wish I communicated with my cat better so I could make sure he always has what he needs but I don't meow right. I wonder if he wishes he could see more of the world, but I'm not going to let him go running around outside by himself - he'll get hit by a car. I feed him, and clean up after him, and try to play with him to keep him engaged and active and healthy. I try my hardest to let him know that he is loved always, but sometimes, I don't know if I'm a good enough parent for him.
Which is why some days, I think the most important thing I can do is snuggle with him and offer him a warm lap or a soft tummy to sleep on. Yes, there are other things I need to get done in my life, but he won't be around forever and I want to make sure his time with me is satisfying for him. I want him to have a good life, and to be happy with me as his person. So if that means taking a nap on a Sunday afternoon and letting him steal all my warms, he can have them.
Being a parent is hard. But oh so worth it.