I have allowed it in the past and one of the issues that came up was baby being hungry and mom wasn't due for another 15-20 minutes. After a few times of handing off a screaming distraught baby to the mom she finally realized the visits were more about her and not the baby and she started pumping at work and bringing bottles for the baby and everyone's lives were much easier. The fact the child is already taking bottles negates the need to come and feed. I would be a bit more tolerant if this was a last minute emergency type of care situation and baby was exclusively breastfed and we did it till baby was comfortable with bottles. I did have one mom that was an extended breastfeeder and she wanted to come in and feed her 2 year old after work - um child just had snack within the hour and supper I assume is as soon as you get home and it is a 15 drive. She used to sit out in her car which she parked on the street in front of my house and feed the child so they could have some cuddle time at the end of the day. I mean really a quick hug at pick up and the child couldn't wait another 15 minutes. After the cuddle the child still had a snack and cup of juice in the car for the ride home. Wonder why she was a poor eater at supper.