In a very awkward spot with my boss?

My boss has never really liked me but we have had a stable working relationship for the past 10 years. Recently at his 40th birthday we all went over to his house for the party. I brought my wife and daughter. My daughter is almost 30 years younger than my boss. So my wife and I had a little too much to drink and we ended up staying the night instead of driving. Ever since then my daughter has asked to stay the night at my boss's house. I don't want her to and try and talk her out of it every time but ultimately if I don't let her go I'm afraid I will get fired. Also there is a senior lifeguard position that has come up and even though I think it is a long shot it's an opportunity of a lifetime and I do not want to compromise my chances for the job. Very torn and seeking advice. Thank you.