@obedientsacrifice Talk to them about the bad experience you had with jokes like this and that you don't want to repeat it with your daughter.
Make it a 5 minute conversation rather than an offhand request.
@neo1314 My wife after getting married decided she didn't want kids. I was crushed. I worked on it with her and she eventually agreed to one.
Fast forward we have two amazing daughters ages five and two.
Work on it with her. Talk it all through.