you might ask her doctor.
in any case lead should be a big concern
if you go ahead and the baby has ANY TROUBLE at all mom will blame it on you and your project:(
as a note of warning some friends waited till after the baby arrived, and the job dragged.
their son got into home repairs, by 2 he was helping resand already finished walls, helping demolish a new section of drywall. you get the picture. its not good. his efforts made the job much worse.
although it has made for funny stories.....