Nah, Suzaku is too much of a wuss to force himself onto any female, especially a girl like Kallen. And Kallen is too strong a girl and too in love with Zero to let anyone other than Zero do something like this to her.
Indeed? Cum inside her? She'd only let Suzaku cum on her tits or something like that. Never inside her.
On a side not, Kallen is just another typical one-guy-only girl. I hate those in anime... I mean, she's all boobs so it's all about the fanservice, and she's fictional so who cares? But it bothers me that she's not as fleshed out as zero, who, as big a cliche as he is, is very well made.
Also, awesome pic. But judging by the tons of guys all around the world cumming buckets, everybody knows that.