A lift home

I work in an office I became good friends with the girl at the next desk we occasionally went for a drink after work, we told each other filthy jokes she told me a lot of jokes about lesbians, we found out we lived fairly near so we decided to take turns driving each other to and from work to save on petrol, I was driving her home when my friend
and work colleague did something that surprised me, she said I hope you don't mind I am very hot I am going to take my knickers off she didn't wait for my answer she just puller her skirt all the way up and took them off I could see everything she didn't pull her skirt down I could see her bare bottom was on the seat next to me, she looked at me and smiles and said you don't mind do, on I didn't I said, it was unexpected I got a warm glow down below by the time I got home my knickers were saturated, what message am I getting was innocent or an invitation,

I think I should add my reasons for being hesitant I am 41 my friend is 23 I am old enough to be her mother, what if I was wrong it could ruin a friendship I do want her sexually I couldent sleep thinking about what we could be doing to each other the pleasure we could have, I will find out for sure when I next take her home.