What to do?!?

I really have it made. I work 2 days a week doing transcription for a neurosurgeon/infectious disease office. I work one day a week at the Abba Clinic (our church's pregnancy resource center) and 2 days I get to be home to do the transcription I do for the OB/GYN office, clean the house and be with the girls. At the Neurosurgeon part of the office they have have a check in girl that works 8-12:30 M-F. She is leaving. They have asked if I'm interested in that position and do my typing in the afternoon. Financially it would be awesome BUT part of me doesn't want to give up my time I do have at home. Faith will be in first grade in the fall and Hope will be 3. I'm really torn on what to do. It would only be about 32 hours/week. The office people are great and I know I'd like it there as I already do. I'm just praying I make the right decision.