More than one...

As you cross the room, James and Nick look up from their books. Well that changes things a bit. "Are you doing laundry or something?" Nick asks. "No," you say, "why?" "Well, you're not wearing very much." James says. This makes Mark look up to see what it is exactly that you're wearing. "I just felt sexy today, that's all," you reply.
"What makes you feel so sexy today and not yesterday?" James asks.
"I feel sexy every day." You quickly pull down your shirt and bra, exposing your big tits to the three guys. "These help."

The guys are floored. They knew you could be outgoing, but they never imagined you being so wild. As you put your breasts away Nick asks what else makes you feel sexy. You laugh and tell him wouldn't he like to know and disappear down the stairwell.