name drama with family

So, we have a name that we like for a boy. We always choose biblical names that mean something to us. And we are sticking with a particular letter for all of our baby names. Both my husband and I liked a name and when I was pregnant last year (which ended in a miscarriage) for if we had a boy or a girl. My sister-in-law said she always loved the boy name we chose and wanted to name her future son that name and she was upset that we were planning to use it. She isn't married and definitely isn't pregnant. So we changed the name to something that we kinda like. Now that we are pregnant again (granted, we still don't know the gender), we still REALLY like the original name we picked for if we have a second boy. I don't know what to do, but I think my husband should talk to his sister about it.