Basic Capacitor Question To help Cement My Foundation Properly (LTSpice)
V1 is a constant-voltage source, so, by definition, the voltage between V1 and R3 will be 10 volts, regardless of anything else in the circuit.

The voltage between C1 and R3 will vary around 10 volts, as C1 will be charged to 10 volts by V1, and the AC voltage from V2 will be coupled to the C1/R3 point by C1.  If you use a larger capacitor (perhaps 0.1  - 1 uF) you should see the voltage between C1 and R3 varying between 0 and +20 volts.