Baby looking like stepchild

Stephanie. • Military wife. Pregnant with baby #3!
We had a 3D ultrasound done and someone made a comment that the baby looked like my stepson. I became extremely upset immediately. I don't even think my stepson looks like my husband and I feel like to say my baby looks like a child I biologically had absolutely nothing to do with was very hurtful. This hormones are also brutal! Am I being unreasonable?