Is it mean to go on holiday with your husband 5 weeks after giving birth, leaving the baby with Grandma?

Okay so my husband wants me to attend a conference with him 5 weeks after giving birth in another country but as it is my first baby I am not sure about it. My mother is happy to look after the baby for the 5 days we are away. Would I be a bad mom for doing this or would it be a good break for the two of us ?