[Bellamy said she was sincere. There's a lingering suspicion inside of her, one that makes her think that perhaps Bellamy is behind this. Lexa is doing everything in her power to trust him, but he makes it hard. Or rather: he made it hard when he slaughtered three hundred of her warriors in their sleep.]

I wouldn't call it altruism. We have a mission to accomplish here. Providing technology that would alleviate worries would help our cause. [Even if she's not a cheerleader for the Nest, she is a fan of being successful in stopping their Enemy.]