Tell me if I'm tripping

I often get jealous because my husband has a child I have a child also that I don't get to see and we previously had a miscarriage. He thinks I don't love his son but that's not true, I just want my own kids... Anyways we went to pick up his son and he asks me to pick his baby mom up every week to get to the doctor... My question was how has she been getting there??? How the heck does that turn into "ITS NOT MY FAULT YU CANT SEE YOUR SON!!" Look ladies...I just started my period this morning. Now I don't think I'm being rude when I ask how she has previously been getting to where she needs to get. I could see if she had absolutely no ride... Then gone say I can't charge her gas money??? Excuse me... Who is the wife?!?! I couldn't deal so I went shopping. End. Of. Story.