It’s clear from Travis’s behavior that his addiction struggles are getting worse. In addition to his obviously worsening health, his personality is also changing (Daunis has described him as having been happy-go-lucky and kind prior to getting involved with meth). In this passage, it’s worth noting that both Daunis and Travis are fighting to control Lily (though Daunis is trying to protect Lily, a noble goal). Seeing Travis’s behavior, Daunis decides that it’s not worth it anymore to try to keep secrets. This offers some hope that she might be able to get some support from Jamie and eventually, from the wider community as she tries to help Lily and get Travis help.