I know that doesn't help much, but it's a mother-daughter thing and I don't think the kid is in any danger.
When you withhold information from your mom, you put a strain on the mother-daughter relationship and the trust your family has in you.
For seven seasons, the Gilmore Girls (Lorelai and her daughter "Rory") entertained fans with their fast paced dialogue, close mother-daughter relationship and romantic woes.
Lorelai and Rory are the mother-daughter pair that the show centers around.
Soon after the show wrapped, an assault turned this mother-daughter feud into tabloid fodder and formed the basis for the second season of the show.