Husbands Teenage Brother

I've been married for 2 years and for the last 5 weeks ive been sleeping with my 16 year old brother in law.He's been staying with us on and off and i liked the company when my husband was working,we got really close over time and i told him things my husband doesn't no,it all started when i went up to see if wanted something to eat and caught him having a wank with my black lace knickers wrapped around his cock,I said he should stop that because his brother just got home.sitting at the table i had a little fun by showing my cleavage knowing he couldn't stop himself from looking,I made my mind up then that the next morning i was going to have sex with him.following morning came my husband left for work and i walked into his room completely naked and he was staring at my bald pussy i got in bed and layed next to him and stroked his cock and it didn't take long for him to cum,I knew now he got that out the way i was straight on him slowly riding his young stiff cock letting him enjoy every second of it, The only time he said a word was im going to cum a few minutes after the first time, he's a horny little fucker always up for it ive even had to fuck him in my car to try and calm him down.