Dating a soon to be divorced man

Hello,

I have a question that I hope is not judged, I have been dating a soon to be divorced man (finalized in three more weeks.)

Him and his soon to be ex wife had a trip (couples cruise) that they paid for in advance way before the divorce. He told me that he is still planning to go on the trip (5 days) with her and that he hopes it doesn’t mess up anything with me.

My question is how would yall take that? What would yall say to him? What would yall do? Would yall just end it with him and tell him to go be with his ex? I need some advice on this one. Please! Thanks in advance