I did this stuff with my ex before I was with my current gf (the only one for me). Now my current gf hates me?

Well basically there was this one time when i was asleeep in a tent and she came to me.......she undressed me i undressed her...... we both ran naked in the field and swam together she drew pictures of me in the nude and then we spent the remainder of the night in the tent not sleeping