Complex sentence: At the same time Colonel Montoya visits Captain Grisham who is in bed with Vera, his lover, Montoya concerned about Tessa wants to ensure control of her land by having Grisham propose marriage.
Split into simpler sentences: At the same time Colonel Montoya visits Captain Grisham who is in bed with Vera, his lover. Montoya, concerned about Tessa, wants to ensure control of her land by having Grisham propose marriage.