Don't feel guilty!! My sister isn't even bipolar and doesn't spend as much time with her son as she would like. Being a mom is hard! I'm lucky that being an aunt is all I have to worry about. But there are plenty of mom's like you. Just do the best you can. Ten year old triplets!! Yikes! That's tiresome to just think about. Your kids are happy and healthy. Sure you can do more, but sometimes you also have to think about your health so you can be there for them. Take it one day at a time.