Saved For Me by Abby Knox

Lars Anderson is an undercover cop investigating the dirty deeds of a powerful crime lord. Complicating matters is Lars’s innocent new neighbor, who may as well have a target on her back in this seedy neighborhood. Whether she wants it or not, she’s under his protection now.
Wendy Wilson is a poor college student who’s been on her own for some time. When she takes out an online ad looking for babysitting work, she finds herself in a dangerous predicament. But the one person who shows up to help her might be even more dangerous to her virtue than being held captive by an evil kingpin.