This reminds me of a conversation I had with my mom during the summer.
Mom: does it bother you to think that I have sex.
Me: sometimes, yes.
Mom: and does it bother you to think that I used to have sex with your dad?
Me: a little.
Mom: well I'll tell you what, the best sex I've ever had was when I got pregnant with you and your sister.
I still don't think she understood why I was so grossed out by that.
*Bows and backs away in deference to internet superiority*
I follow back :)
Mom: does it bother you to think that I have sex.
Me: sometimes, yes.
Mom: and does it bother you to think that I used to have sex with your dad?
Me: a little.
Mom: well I'll tell you what, the best sex I've ever had was when I got pregnant with you and your sister.
I still don't think she understood why I was so grossed out by that.