Their adult son and adult daughter!

Jack and Katie looked at their bedroom door to see their son Finley and daughter Sarah staring in shock at them.

"Hi Finley!" Jack exclaimed.

"Hi Sarah!" Katie exclaimed.

"Hi Dad..." Finley replied.

"Hi Mum..." Sarah replied.

"Is something wrong?" Jack asked.

"Do you need something?" Katie asked.

"We heard lots of noise..." Finley answered.

"And just came to check on you..." Sarah answered.

"Oh, sorry we were so loud!" Jack replied.

"We were just having so much fun painting!" Katie replied.

"It sounded like it..." Finley said.

"And you sure were..." Sarah said.

"Would you like to help us?" Jack asked.

"Would you please help us?" Katie asked.

By this point Finley and Sarah were so addicted to the lustful scent of the parasitic silver that they didn't even bother to answer Jack and Katie. Instead they pulled off all their clothes and jumped onto the silver bed. As Finley and Sarah smeared silver all over each other Jack and Katie spewed silver all over them. Jack and Katie then retrieved gloves, socks and pumps for Finley and Sarah which they desperately pulled on. Soon Finley looked identical to Jack and Sarah looked identical to Katie.