Would that be legal?
A shame Barkin's grandma didn't do the same when her daughter became pregnant.
Of course it's legal. On the other hand, it would be illegal to DENY an abortion to her.
I have no data on this, but I suspect that mothers strongly urge or force their teen daughters to have abortions more often than most of us suspect. Particularly when the pregnancy is in a "happy" family with a good image.
The mother of the pregnant woman isn't the only person who may coerce abortion. It may also be the boyfriend (Jennifer O'Neill's experience), father of the baby (Rae Carruth), father or sibling of the pregnant woman, and others. In short, anyone who doesn't want the "hassle" of the pregnancy OR the pregnant woman.
See the website of the Elliot Institute for lots of interesting and informative information about "choice"
www.afterabortion.org