What is happening? Is this normal?!

Aubrey

Today I was chilling at home and got up to get a drink of water, I was wearing really loose shorts and no underwear ( because I was lounging ) and as I am pouring my water I feel something dripping down my inner thigh and it is cum! My fertile window ended two days ago! I did not feel aroused at all.. Is this normal, has any of this happened to you guys?