OMG NO - do NOT let him pull the front teeth due to 'possible' infection. If she gets an infection then she can get antibiotics and it will clear the infection up.
The ONLY reason he should go ahead and pull teeth is:
1. her adult teeth are ALREADY SHOWING, the baby teeth were loose already and she would have lost them in the next month or so.
2. The root of the tooth/teeth is/are DEAD- if this happens the teeth will begin to turn 'grey' within the next day or 2.
If anything else he should leave the teeth in and let them fall out naturally, as they would have. You will notice that even though they are a bit loose now, they will 'tighten' as her mouth heals from the trauma.
If he pulls them now the other teeth will start to take up the space and this will cause BIG problems when her adult front teeth start coming in. He may want to pull and put in a spacer - I would NOT let him pull her teeth.
I hope she feels better - poor baby.