Looks to me that Thomas did a runner or they split up;
1861 Census
Jane Tillson 51
John Tillson 26
Ann Tillson 15
George Tillson 7
George Tillson
Baptism Date: 7 Dec 1852, Stoney Stanton,Leicester,England
Mother: Jane Tillson
Likely Birth Reg for Ann c 1846;
TILSON, - -
GRO Reference: 1846 S Quarter in HINCKLEY Volume 15 Page 58