2 NAT statements for the same public IP address - fundamental network question

This might be a strange question but let's say I have a webserver that hosts a website.

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Internally this website is 172.28.250.2 and lets say I have a NAT statement on my firewall to resolve this to some public IP address of 67.x.x.67 for customers to hit from the outside.

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Let's say the URL to this website is www.abcd.com and now I want to add a second url that goes to this same website as well lets say www.dcab.com ( I guess they would call this an ALIAS in DNS) so they would both go to the same website. Lets also say that these 2 URLs internally resolve to the same IP address of 172.28.250.2 as mentioned above, but the second url has a different public IP address lets say 68.x.x.68

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Let's say I didnt have access to DNS to make the 2nd one resolve to the same IP address for customers on the outside to hit. As a backup plan, Is their a way that I could make a NAT statement on the ASA to take this new URL outside IP address also NAT against the 172.28.250.2 address. I believe that this is a fundemntal problem since now you probably can't have 2 different outside IPs resolve to the same internal IP...but maybe there is a trick here that I'm not aware of?