What would you do?

An acquaintance who is Catholic, married in the church and has asked me for advice about catholic schools and ccd for her children, recently mentioned in a casual conversation that she is considering getting her tubes tied.  I stammered a bit and said, oh, don’t do that, it’s so permanent, but afterwards I felt unsure as to whether I should have said more about the moral problems with sterilization.  On the one hand, it is sort of inappropriate to get into it on the playground, and other hand I feel like if she even remotely knew what a concern this was, she wouldn’t mention it so lightly, and if I don’t tell her the truth, maybe no one will?  I am thankful for the people in my life who taught me about the church teaching on contraception, because without them I wouldn’t have the marriage and children that I have, but I don’t want to scare people or seem judgmental.

Thoughts?