R.Y.
My daughter was the same way as a baby. At 3 months I still woke her up enough to feed her before I went to bed and she would sleep in until 10 or 11 am sometimes. I did let her stay up until 9 or 10 pm (her older brother goes to bed at 8 so she got extra attention after he was in bed). Enjoy having a baby that sleeps through the night. Wake her up a bit earlier in the morning if it works better for you. She will adjust her naps to compensate.