Finally it was the week of the play.I would put a comma after finally. Also, the last two sentences are in present tense, but the rest of the paragraph is past tense. I think it would be better just to change the last two sentences to past tense.
The great oak doors closed with a soft#FF0000 ">, but firm thud behind the Welch's family as they entered the church#FF0000 ">. However the noise sounded like a thunderclap in the #FF0000 ">crackling tension that filled the room. Aware that they were being watched out of the corner of many eyes, the family quickly took a seat in the back pew. When they had all filed in, Mr. and Mrs. sat #FF0000 ">and paid respectful attention to the man speaking, the two younger boys figited in there rarely-used black dress clothes, and the older boy #FF0000 ">who at least attempted to look like he cared. But Adrian's face muscles were tight from trying to remain a #FF0000 ">neutral expression.