Your going to find during the planning process that one thing it true...You can't please everybody! From bridesmaids, to in-laws, to friends and relatives...everybody's got an opinion. Learn to listen, but ultimately do what you and your future husband feel comfortable with...it's your day. You didn't mention his stance on this, so I assume he's neutral on the subject. Religious traditions can vary greatly as to the when and where a ceremony should be conducted. The best advice I can give is to ask yourself..."Why do I want it my church?" If it's becuase of the pastor/priest...a potential compromise would be having yours do the ceremony at your future in-laws church...or vice versa.
Your going to get to know your in-laws quite well over the next few years...start it out on the right foot. Ask them why they want it their church...then invite them to a service at yours, as well as volunteering to come to their's. Who know's? Maybe you'll love their place, or they'll love your place and that bump will be behind you.
Good luck...Remember...the 'devils' in the details...
