Here is another of the whole plant

Nice bloom and a pretty healthy-looking shrub.

Looks like one of the camellia japonicas. Check pictures of Bella Rosa, Colonel Firey and the various Mathothianas.

Looks a little like a Mathotiana to me but in our part of the country (SC) it would be much too early for it to bloom. It does not look like a sasanqua bloom, however. Sasanquas are blooming here now.

Gardener, sorry, this picture was from last spring so maybe that would help.