dwarf and giant mating?

[cyris69]

Ok, so I just got home form work and started hearing a deep base noise and went into my frog room. Sure enough my male dwarf is attempting to defile my female giant.

They are both over 2 years old and this is the very first time I've hear any croaking. He was latched on to her like vice grips. I eventually broke it up after fear of him drowning her as she was held under water for a while.
I'm compressing the video right now in premeir then will link it here when uploaded to youtube.

I don't want frog babies, but I don't want to stop nature. I thought this was a fairly rare occurrence?

EDIT 2:
Ok mating video is up!