Picking an Officiant

This is somewhat of a long story, but the short version is that we were originally planning on asking my aunt to be our officiant. We used to be very close, but recently I’ve found this isn’t as much the case, so I was planning on scrapping the idea. My mom ignores this (despite having told her my intentions) and asked my aunt “for me” this past weekend. My aunt “wasn’t sure,” but my mom continued to pressure her until she gave a hesitant yes. Now I’m having a serious dilemma-do I just have my aunt do it anyway even though she definitely did not seem to want to, or do I find somebody else and then have to tell her we got somebody different?