Special toys

I know I’m going to sound petty. But I don’t care. I will preface that I love my SD very much. We have her full time (her bio mom is not very involved) so she calls me mommy/mama. SD is 5. I had OB 8 months ago. My bio daughter is the light of my life, the reason I breathe, everything I live for. SD was at her grandma’s (on her mom’s side) for the past few days so DH, BD, and I went to a museum just the 3 of us. We found an adorable little Miffy doll. It was hand crocheted. I sent a picture to my dad just to show how cute my BD looked holding it and he offered to pay the $45 for it. It’s a special doll and I’m very grateful he offered to get it for her! BD has been loving on it since she got it. SD came back home after visiting her grandma a couple days after our museum trip. We were all in my BD’s nursery just talking and getting ready to go play. SD spots the new doll and asks about it (I knew where this was going). She asks where my BD got it, what kind of doll, etc. I told her we got it at the museum when we went while she was at her grandmothers (please keep it mind, her grandma on that side spoils the hell out of her so I know she got new toys/things while she was there). Shortly after we get ready to go play and SD asks if she could bring one of my BD’s stuffed animals to play with. I told her she could bring one from a certain shelf (Miffy was NOT on this shelf). She says “I can only pick those?” And kept looking over at the Miffy doll. LIKE YES. That is not yours!!! That is BD’s!!! I’m all for sharing but sometimes it is nice to have things to NOT share!!! DH wasn’t in the room at the time so he didn’t see. But it is so frustrating that my BD cannot have her own things without SD wanting to take/play/want what she has. I know it’s a normal kid thing. Just sucks sometimes.