Pregnant niece has gained 60 pounds...?

theres nothing you can do i was like that when i turned 16 and i got pregnant although i only gained 60 pounds but just let her know how you feel about it, don't hurt her feelings alot of women think its normal to eat like that bc they are "eating for 2" which is entirely not true,she only needs about 500 more calories a day which is one snickers bar, so maybe buy her some informational books, or take some pregnancy or nutrition cles and if she still doesn't get it she will surely see after that baby is born how long and hard its gonna be to lose that "baby" weight