Reading 1 Wolves 0
with Noel Hunt in attendance Collins misjudged his header and looped it over the stranded goalkeeper.
Wolves could not have made a worse start and Quashie and Richard Stearman summed things up with a sickening collision as they went for the same ball.
Both players recovered to play on before Noel Hunt wasted a free header from his brother Stephen's corner.
The visitors then created their first chance and after Sylvan Ebanks-Blake had played in Matt Jarvis, his low cross was stabbed wide by Andy Keogh.
Michael Duberry was then forced off with a head injury to leave Coppell without three of his first-choice back four.
Noel Hunt then hit a dipping free-kick which was superbly saved by Hennessey as the first half drew to a close.
Jarvis had the first sight of goal after the break but after exchanging passes with Ebanks-Blake he sliced his drive across the face of goal.
Noel Hunt then tested Hennessey again with a sharp header in a rare chance as the game descended into a midfield tussle.
Wolves substitute Chris Iwelumo had a shot saved by Adam Federici at the climax of the game's best passing move which saw Michael Kightly, Ebanks-Blake and Karl Henry combine with some fluid one-touch passing, but his effort would not have stood after the linesman flagged.
Kevin Doyle has scored 17 league goals this season and broke free to lash a shot into the side-netting as the clock ticked down.
Noel Hunt then added to the growing injury list for the home side as he hobbled off before Collins was dismissed after an altercation with the linesman as the nervous Royals held on to claim three vital points in their quest for promotion.
