How likely is this

My great great grandmother born 1857 had 3 illegitimate children after her husband died in 1892 , twin girls in 1894 and a son in 1895 ,the father is named on all 3 Birth records , I have been trying now for a few years to narrow down exactly who he was as he isn't with her on any census records, somebody has her in his tree saying the childrens father was born in 1880 ? is this feasible as he would have been 14 when the twins were born ?

Thanks

How likely is this