I have a lovely MIL in her early70's, now sadly widowed. She occasionally babysits & generously offered to have DC o/n so DH and I can attend a work dinner in London (4 hours away). I think that it is a bit much for her as our youngest (only 2) is a handful. I will be stressed leaving them as we can't easily pop back if there is a problem. DH wants to go. I don't want to upset either of them but equally don't think I will enjoy going or feel relaxed when there. Not sure what to do.