I don't know if anyone has said this yet, I didn't see it when I quickly scrolled through, but you could always distract them from acceptance with asking for a visit.
So in response to getting accepted:
"I got accepted? That's fantastic news! I would love to visit the department sometime in [month], how would I go about setting that up?"
In this way you can avoid the awkwardness of mentioning other schools, you can go see if the department meshes with your personality, and you have expressed the correct amount of enthusiasm and consideration for said school.
Just my thought anyway