Nurse going overboard or am I jealous?

my mans in the hospital I was there yesterday when i suprisingly heard the outgoing flirtatious nurse ask my man if that was his only child? She then gave him a five minute lesson about diabetes. Her attitude and smile was overly done. He was so in love with her butt he way they communicated they sounded like a couple.....she said "im yours all night with a big chessy smile and he giggled. Five minutes passed she returned and said if all okay he said no the needle in my arm hurts can you change it....it toke her 20 minutes seriously...then she kept looking at him in the eyes an smiling for long periods of time. She came once more because he called her to ask about if he can have an outside soup...and she talked about it as he joked back ..hints...It felt as if a doctor was talking not a nurse..she asked if he drank I answeres he shut me up tI said he drinks like 36 beers a week. She looked at me gave me a dirty look and asked that if wecan leave soon because children shouldnt be there too long....They are fromsame country and it felt like i had no say so and they realllly like each other...she gently caressed his arm.....i left ....i really think they exchanged numbers...for reals. should I ask him or not....what should I do ? It was wrong...