The Twins are at it again

You return to Hellvault, your lair in an active volcano, to see your two youngest daughters, Winter and Crystal, twin frost dragonesses that hatched from the same egg. They got their porcelain skin, red eyes, white scales and hair from their other mother, as well as her bitchy attitude, but at least were blessed with your well-endowed and toned body. Currently their horns are locked as they angrily spew insults at each other. If you didn't know any better, you'd think they're about to kill each other. However, you're their mother, you know every kink your offsprings are into, and the twin are very fond of rough hate sex. They grab each other's dick and start vigorously pumping each other as they tongue each other's mouth, they must be ready to go. You enjoy watching them embrace their domineering side as they fight to peg each other. However, you could use this as a chance to release your frustration for what happened earlier on your bitchy daughters.