K. - Hang in there!! I know how long the days and weeks can feel when cleaning up pee all the time!! I'm currently potty training my third, and we're doing pretty good. She is young, but we've been using cloth diapers, so that's pretty common, and she has two big sisters and another 2 part time girls I babysit whom she sees and wants to imitate. So when she started telling me, "Mom, potty" after she went in her diaper, I decided to take her to the toilet, to make the connection.
Pretty soon she was going some more when I took her. Now she'll tell me potty, and sometimes she'll go full blast, and sometimes she won't go at all and I just say, Okay we'll try again later. We use panties at home or go naked, because in a diaper she doesn't say anything as often. I wish she could pull down her own pants, because then I think she would go in by herself some times.
I guess my only point is to be consistent, and don't give up now. You will have a much harder time trying to train a 4 year old who has realized that it's just easier to pee in the pull up. Your daughter probably already knows this, too, but at least has the interest in using the toilet. Don't give up!! She'll make the connection soon, and then it will go quickly from there.
I remember the understanding light up my second daughter's eyes the first time she watched herself pee and I jumped around the bathroom clapping and cheering. (Coincidently, this was the same day that I threw a fit while cleaning up the peed-on carpet and announced that after 3 weeks of patience I couldn't stand the smell of pee anymore and I Quit!!!) That little sparkle in her eye was so obviously understanding, and although there were accidents sometimes, after that day she did really well with it.
So press on, and blessings to you and your husband as you keep with it. Reward yourselves for your patience as well as your daughter when she makes the connection herself!