Breathe Again by Bonnie R. Paulson

Maggie Lachlan is struggling to get over the death of her husband. After being overcome by emotion during a shift in the E.R., she's suspended indefinitely. Making things worse, she needs a place to stay after the quick sale of the house she shared with her late husband.
Fortunately, her friend Ryan Stewart offers her a room while she gets her life in order, much to the chagrin of his brother and housemate, Brodan Steele. Brodan doesn't want to like Maggie, not when he knows Ryan has feelings for her too. But it's hard to deny the attraction he feels for her when she's sleeping under the same roof.
Being so close to Brodan awakens something in Maggie, something she never felt during her marriage. But as long as she's haunted by the past, she can't open herself up to the future...
59,000 words