What's your most exciting/favourite moment when watching?

[Maledomdick]

I'm wondering what you guys think is the most exciting moment when watching your wife/GF having sex with a stranger/bull/BBC. For me there are two:

• The moment he slowly start entering her, parting her lips with his dick and start sinking in balls deep for the first time that night.
• The moment he starts to cum inside her, claiming his territory.

What moment is most exciting for you when watching? (Photo's and video's of amateurs allowed )