If i may sugest, try some different positions. Positions like standing doggy style gives the reciever more control. If you do like that position try it, the trick is the further u bend over the deeper and faster he can go…the furthur u straighten up the more limmited the penetration is. use this when u scence hes getting a little too excited.
another thing to try is ask to be on top…you control the pace and the penetration depth.

Truth be told it means you realy realy turn him on.
And also if he’s bothered by it as well talk to him about it when the lil ones are asleep or when ever you have time…there are many blogs that give good segestions.
Good luck!
I hope i’ve helped in some way.