My partner of 6 years and I have a 6 month old. He has a 12 year old from a previous relationship and pays his ex partner £300 a month plus any extra she asks for. He also spoils his 12 year old when he comes to stay with us like buys him new games or clothes whenever he asks for something. Whilst I 1000% agree and understand that he needs to support his older child too, I feel like he doesn't support our 6 month old as much. Since our baby has been born he's only bought him around 5 tubs of milk so once a month. Me and my partner go halves on all of our joint bills i.e. rent and utility bills and I pay for the car we both use but I struggle financially every month making sure our baby gets everything he needs on my own. I'm the one that makes sure our baby is fed, clothed and I pay for all of his baby groups. I feel like my partner supports his older child more than our own and I do think it's unfair as it's clearly not 50/50. I have obviously tried to talk to him about this but I just get brushed off every single time. Am I being unreasonable to think that it is unfair?