Back story: My future sister-in-law has a 3 year old from her previous marriage who my fiance and I would like to include in the wedding (he's family now after all). We thought he would make the most adorable ring bearer. She also just had a baby which will be 9 months old by the time our wedding rolls around.
Situation: We don't mind the children being at the ceremony (obviously) and we figured they could come to the beginning of the reception to get some food but feel that it would be inappropriate to have them stay for the entire time. It's going to be really loud, 5 hour open bar so you know people will get intoxicated and quite frankly, it's our day and we would like the attention to be on us, not the new baby.
What we need advice about: We've expressed our wishes to my sister-in-law but she is insisting that her children be at the reception the entire night or she just won't come at all. We don't want it to come to this because we really want her there along with the little ones for the appropriate amount of time. What is a good way to handle this situation? Should we suggest a local babysitter since they're not from the area? Would we be the ones to pay for it or could we suggest that we split the cost? Or should we just stick to our guns and have them figure it out on their own?