Think my starter is infected. RDWHAHB

Made a 3000ml starter for my Wy2565 Kolsch yeast a few days ago. Its been in the fridge for 2 days, so before I decanted it, I gave it a sniff and it had a slight sulfur/eggy smell. I tasted a bit of the decanted beer and it was fine. I should mention that after I pitched the yeast into the starter, and returned home form work about 7 hours later, I had a pool of yeast on the counter. Im glad SWMBO was not at home. Nothing I can do about it now, my beer is boiling and LHBS isnt open until Tuesday. RDWHAHB.

Sounds normal to me. Kolsch yeasts are known to produce sulphur smells.

Use the yeast. Its just fine.

You're fine.