The 1910 census shows, for Romana 23 and Juan Sanchez 28 of Metcalf, that she immigrated from Mexico in 1901, he immigrated in 1902. In 1910 they had been married 5 yr. She had born three children and all were alive: Manuel 4, Miguel 2, Luisa 8 months (the census was taken in April). They lived on the east side of Chase Creek. Juan had not yet become a citizen; in those days, wives and children usually became citizens when their husbands/fathers did, rather than separately.
I hope this helps.