Is it normal to want his wife to blow me!

I'm married, but we recently met another couple and his wife is smoking hot! And she deserves sooo much better than that short little girly boy she's with..I'm probably twice his size, well I just have a huge fantasy of her sucking the hell out of my cock and letting me blow a huge load all over her...how do I go about it?? And of course, is it normal?????