When a girl sends you screenshots of her conversation with another guy being flirtatious, it could mean a few different things. One possibility is that she is trying to warn you or get your opinion about the situation. She may be seeking advice or reassurance, and by showing you the conversation, she is opening up to you and signaling that she values your input.
On the other hand, she may also be using the screenshots as a way to strike up a conversation or build a connection with you. By sharing something personal and vulnerable, she is creating a bond between you and inviting you to respond. Additionally, the fact that she is showing you flirtatious messages from another guy could be a signal that she is interested in you and wants to gauge your reaction.
It's important to note that the meaning of this behavior can depend on the context of your relationship with the girl and the tone of the messages. If the screenshots are accompanied by playful or teasing comments, it's more likely that she is trying to flirt with you. However, if she seems upset or concerned about the other guy's behavior, she may be seeking your support or advice. Ultimately, the best way to understand her intentions is to respond in a kind, open, and respectful way, and see where the conversation leads.