Brief summary. I have been talking to this person (woman) for a few months now. The other day she was looking and giggling at her phone. I asked what’s up? No big deal you know? She said oh talking with this dude. I ask what dude. She said she met a guy on Reddit and had been talking for a few days. Turns out she’s been sexting him. Photos. Spicy conversations. Turned into a big argument. She said what’s the big deal? He’s in Seattle ( we are east coast), so it’s not like I’ll ever see him. After more back and forth I told her cool have your fun and left. Haven’t talked to her since. She tried texting me a few times last night saying I’m being immature and she doesnt know what the big deal is. It’s just harmless fun. AITA?