We all know Stephanie Pratt was at Holly Montag’s 26th birthday bash at Empire (which resulted in Pratt’s DUI), but where was HEIDI Montag?   Sources say Heidi didn’t attend her sister’s bash because she wasn’t being PAID for the club appearance!!!

An insider said:

“Holly was really wishing that her sister could just be a sister and stop by her birthday party, but Heidi only goes places if she is getting paid,” the source said. “I mean, this is her sister and she wouldn’t even show up without a fee. That’s disgusting.”

Holly’s party was held at LA Hot Spot, Empire on Saturday, October 17th.

What do you guys think?  Did Heidi choose Money over Family — or is there more to the story?