Girls, calm me down. I'll start by saying that we live with my husband…

Girls, calm me down. I'll start by saying that we live with my husband's parents, meaning his father and his second wife. My husband's mother lives in another city. Our relations with them are quite good. His stepmother has never had children. She treats me very well, helps around the house, watches over the kids better than I do, makes gifts for me, you could say she's gold, not a stepmother. Now to the problem...? After giving birth, I started feeling jealous of his older son towards her! While I take care of the younger one, he sleeps with her at night too. She really loves him and sometimes it feels like she wants to get closer than I do, and replace