no, it's not realistic.

you have about 45m-1.5hrs of warmup time, to get the motors properly running.

you have to make sure she comes several times before you even think about putting it in there.

lots of kissing, licking, running of fingers, etc.

eventually you "mount up" as it were,

do your thing, and if you're good at it, you can last about an hour, sometimes longer, depending on how your technique is and how compatible the person is with you.

longest i ever went on and off was from about 12pm to 6am, that girl was insane though.

most girls tired out after about 3 hours and cant walk straight for half a day.