Feeling Ignored and Unimportant Because of My Mom's Online Friend

I wish I could talk to my mother, but she is sooooo much more concerned over a young woman over the internet (video, voice, text) she met almost 2 years ago. This woman tells tall tales and lies. Its like a catfish but not idk. She has fake lost a baby, now has fake twins and is magically pregnant again. Several "characters" that have interaxted with my mom has either fake died/didnt exist. Literally had my mom in emotional distraught because of one of the fake deaths. This woman supposedly was coming over with 5 other "characters", and a fake dog back in earlier this year. Literally ruined my birthday this year, because we were trting to show her how fake fake this oerson is being. The last photo i saw of the fake twins didnt look like the one my mom had sent me of them, plus the one she sent me was reversed image searched and dound it posted as early as 2017 on the jnternet. Its not the first time that we've done this, we are also showing the proof of the fake bs to her and she doesnt believe us, her blood family. Its why she doesnt send us photos anymore. She lives in another country and basically my mom is now her mom too. She's always talking to her. This woman is mentally ill I know it and I can't believe anything she tells my mom. I ask for LIVE VIDEO of these so called babies, or husband, or other characters she's communicating with my mother. It just makes me feel unimportant, unheard, and how can I talk to her when she can't even listen to me, even if it's not about this woman. Anything I say she hardly listens to. Struggling so hard having severe mental burnout, intrusive thoughts of the kms variety but not act on it or hurting myself. No job, living with my parents again; useless, worthless. I can't articulate myself as it is and then to feel so ignored, spiteful, and jealous because someone else has my mother's motherly attention... End up so angry and short with her. I don't want to be, but it's the only way I get heard is if I end up getting in trouble by how I respond loudly and upset. Sometimes I don't feel like im 30yrs old, but I guess I've felt like this for more than half my life now.