No she can have dinner at home and sulk, YOU have made plans for dinner (even if it's with take out in your car)

If it quacks like a duck and looks like a duck it's still a duck even if you call it a fish......

Just because you don't call something date night doesn't mean it changes the meaning at all.

Maybe tell her "I am sorry but while your still in contact with OM I will be making my own plans for dinner out" and then leave.

Me: 35 husband:39
Sons 16 and 11 from my first marriage
Twins 5 (boy/girl)
Daughter 3
Affair bomb 2/27/14
He moved in with ow 3/13/14
OW kicked him out 6/15/14
4/2016 he seeks help for sexual addiction