Um... I feel like everyone is extrapolating way too much from this "stay strong for the boy" comment. We don't have any idea if or when lara plans on ctbing. Maybe you guys know things I don't, but I'm just going by this one, single comment. We don't know even know how old the child is, nor do we know what her plans are. And it's not like the comment said, "don't ctb because it will fuck up your child." It just said stay strong. Good advice for anybody on here, really, under any circumstances.
As far as the whole idea of ctbing when you have a young child, well.... obviously if you're suicidal you shouldn't have a child in the first place (no offense to Lara. maybe it was an accident, or maybe you weren't suicidal then but you are now, who knows). A lot of people feel obligated to not hurt their families, and try to do things break up their relationships, make it look like an accident, or just keep on living for their sakes. This is a perspective that we as a community generally respect (or should, anyways). Having a young child is just an extension of that. It will potentially cause much more suffering, for a longer period of time, but it's still the same concept.
Therefore, since we mostly seem to (or again, should) respect the idea of someone who has parents and siblings to disregard this sense of familial and worldly obligations, we shouldn't make an exception for people with children. It may be an unpleasant thought, but we'll all be dead in the end anyways.
On a side note, I have to wonder how good of a parent a person who is that desperate to ctb can really be. Not trying to say it's better to ctb (or not to ctb), just adding a new angle. When you completely lose your mind, it.... changes you.