Determining age of an ancestor

Hello everybody! I have a question regarding which documents are more important to determine the age of an ancestor.

My second great-grandmother, Ramona Pulido González, was baptised on may 13th 1887. In her marriage record, in 1901, they say she is 15 years old, when she was, according to the baptism record, just days from turning 14. This could've been an honest, slight mistake.

However, things get trickier. When my great grandfather was born in 1906, the civil record says she was 26 years old, when she was really 19, and her death record states that she died at 65 in 1950.

My (perhaps novelistic) guess is that since her husband was considerably older (he was 44 at the time of the wedding), they were stretching the numbers (specially the civil registration) so that she wouldn't appear underage with the law (although this was fairly common in these towns and this years). I think I should trust most the baptism record, because it wouldn't make sense trying to explain a seven year old being baptised and passing for a newborn (since the baptism record clearly says "born yesterday"). But I was wondering if I might be overlooking something, or if the other records would be better to determine age.

Also, I don't think there is a chance that I am confusing people; her name matches, as well as the town she was born in (which is very very small and wouldn't leave chance to so many coincidences), her husband's name and parents as well as her own parents, and my great grandafthers birthday as told by my mom, who knew him.

Thanks in advance!! :)