jacking off after sex

My husband and I have been married for 3 years now and this has been happening ever since we got married. Nearly every time after we have sex (he will cum inside me) he will go to the bathroom and jack off and cum again.. is this normal? I feel a little weird about it I guess
**update**
He definitely is cumming inside me. It drips out and I can feel it! He's definitely not trying to lie to me haha