Step daughter

My husband has a 16 year daughter. When we had our newborn pics done for our daughter the birth announcement said proud parents and our names. This time when we get this baby's newborn pics done our 2 year old will also be in the pictures. The birth announcement will now also include big sister. My question is should I include my step daughters name? She won't be in the pictures. On a side note, she isn't very close to her half siblings because of the huge age gap. She also doesn't live very close so she isn't at our house very much. I just think it would be weird to have her name also and people be like who is that?  Advice please.