DH says vagina feels different

Hannah • Endo Warrior 💛 Wife 05/16/15 💍 Mommy to Aurora Jane 10/09/17 our rainbow baby 🌈 and mommy to one angel. Pregnant with a boy, Oliver James due 11/8/19

So, my husband and I had sex tonight and according to Glow, it is my most fertile day.

He said this time, my vagina felt different. He couldn't really explain what the difference was. Any thoughts?