bless her!
my mil said that mashed banana and brown sugar would clear my lo's constipation, but i was a bit dubious of the sugar thing too, in the end i gave her some diluted prune juice and it went to normal rewally quick, but it dependson her age i guess, a tiny wee bit of sugar isnt gonna do any harm as long as its not all the time, i mean have you ever tasted calpol!? and lo's have that and its sweet! do whatever you feel is right x