My friends mum asked me to sleep in her room then winked.?

hi, i am 17 and have a friend called james. I go round his house alot and stay round. The thing is, he always falls asleep early and when i go down for a drink, because his mum is really chatty and bubbly i end up sitting with he a chatting. His mum is 37 and is quite pretty and always seems to be flirting with me. she even slapped my *** when i came home drunk with my m8 and she said u naughty boy. Then last night the strangest thing happened. I was talking to her while my m8 was in bed. and she said, u know jamies dad aint been round a long time and havent been with a man for over 6 months now. she then said , now i know how u desperate boys feel. She had been drinking but was not really really drunk. She then kissed me on the cheek, stood up and said, come sleep in my room, keep me company, then she winked. What do you think she means by this. I dont want to get the wrong end of stick bout this. i said no im tired that night, but thinking i wish i went in her bedroom that nigh. next time im round what shall I do?