Rumor has it that Heidi Montag skipped out on her sister Holly’s birthday party over the weekend because Holly didn’t have the money to pay her for the appearance. According to a source,

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.

Heidi’s husband Spencer Pratt also skipped out on the event. His sister Stephanie did attend, but she got hit with a DUI arrest on her way home.