Help! Cont. Rom. Doctor meets female vigilante crime fighter

In this contemporary suspense romance which could be it’s own novel or part of an anthology but the premise is one night a commotion starts in a hospital as this badass female vigilante crime fighter is doing battle with a bad guy. A hospital doctor gets involved trying to help her. At one point they do a stakeout together... there’s a gap in my memory as to what bad guys they’re fighting, I think she’s trying to protect him. There’s something about her making him hide behind a couch I think. Eventually they fall in love and the ending is they start fostering kids. The young boy they are fostering breaks a plate and he looks scared like they’re going to yell at him but they don’t and they live happily ever after. It has suspense, comedy, action and sex.