No Stranger Than Love (2015) on Netflix

Plot summary

Lucy Sherrington teaches art at the local high school in a small town, where every man she knows pursues her, students and the principal among them. She turns them all down. What she is considering instead is an affair with Clint Coburn, the married football coach. Lucy has doubts about the relationship, so Clint vows that they will not have sex until she tells him she loves him. She says the words reluctantly, and at once a hole opens in her living room floor and swallows Clint. Townspeople arrive one by one to look at the hole, offer theories about what it is and try to figure out how to get him out.