My DP has agreed to work tomorrow on Saturday which is annoying as it's the only time he, DS and I get together as a family but he's agreed to it now so that's that. But he thinks I'm being unreasonable by saying he can't take DS (who is 2) with him to work in a big lorry. DS doesn't sit well on journeys for more than 20 minutes anyway and I just feel that it's unsafe? AIBU?