Ok so I've had some time to process things, and I did a little research. Sungmin did The Three Musketeers where he met SaEun was in Dec/Jan 13/14. So they have known each other for a lot longer than some think! 

SM sent them congrats and both agencies have stated that they will both continue their careers after tying the knot (yeah I was more worried he'd leave SJ....just like I worry that Henry and Zhou Mi might leave SJM because of the backlash over EXO chinese members leaving and the anti's)

So yeah after processing it, OMG think of how cute their babies are going to be!!!! 

I really do wish Sungmin loads and loads of happiness! I'm not biased against SaEun, I actually started watching Boarding House Number 24 and realized half way through the first episode that SaEun was even in it and she's good with the character she plays.