Do not let your friend make you feel bad about your decision. I have never heard of inviting the same people to two showers.
In my circle, we may have 2 or sometimes even 3 but different people are usually invited. My sister just had a shower for my cousin's daugher. Her work friends had a separate shower for her and I hear the father's side of the family was throwing a party for her after the baby arrived. I only went to one and was only invited to one. The only one who I know will be at all 3 is the expectant mother and her mother (my cousin).
In my circle, we may have 2 or sometimes even 3 but different people are usually invited. My sister just had a shower for my cousin's daugher. Her work friends had a separate shower for her and I hear the father's side of the family was throwing a party for her after the baby arrived. I only went to one and was only invited to one. The only one who I know will be at all 3 is the expectant mother and her mother (my cousin).