You just answer Emma by fucking her harder

The answer to Emma's question was evident by how hard your cock continued to be - indeed how if anything it stiffened further. Even when she's talking about being fucked and filled by another man, your slutty girlfriend turns you on.

It's not just Emma keeping you extremely aroused. You watch as James goes from Sophia's pussy to Isabella's mouth and then back inside of Sophia. You watch Sarah have her clit sucked on by Susan. You watch all the girls tease each other into taking turns licking James's anus. Isabella (she was always the sluttiest of Emma's friends) even fingers his ass a little, which causes him to groan loudly.

You are continuing to fuck your girlfriend as she leans against the hallway wall as you watch James have his way with all the hot ladies.

"I wonder who James's going to choose to cum in next. I know he fantasized about Sophia and Isabella when we were dating. He would try to get me to agree to a threesome," your girlfriend ponders as you pound into her.

You keep being about to cum when Emma distracts you.

"I never mentioned it, but James had the biggest loads," Emma says conversationally as you are trying to reach your orgasm. "It would feel like a whole gallon of cum, like when I'd be swallowing it. Don't get me wrong, your dick is bigger, much bigger, but boy did his balls sure churn out cum."

And then again as you're finally about to unleash your load, James loudly announces he's about to cum.

"Oh I want to watch!" Emma says excitedly and slides right off your cock and runs naked back into the living room to watch her ex-boyfriend climax.

You're left standing in the hallway with your messy cock sticking straight out.