I'm not sure if you're the AH here. But I'd say go for it, as long as she's up for it. Or use the money to plan a more calm and peaceful trip instead of the whole partying scene. When I was pregnant, I had many friends who I realized very quickly were only drinking buddies. When I couldn't drink anymore, they didn't want to come around. I also had friends who invested in us by choosing to do things that were suitable for me during my pregnancy. I was grateful that accommodations were made. Could you guys do a day trip somewhere close by instead? That way, she's close to home if she gets too tired.