Paying Mortgage For 1/4 Of An Inherited House

On mobile, apologies. My father passed away in Texas with no will. Probate is close to being finalized by his widow (independent executor of the estate).

I inherited 25% of the property, my sibling 25%, and my father’s widow 50%.

There are no assets in the estate to pay off the mortgage.

The lawyer of my fathers widow sent me a letter requesting if I wish to retain 25% I need to back pay 25% of the mortgage that was paid during probate (about 1.5 years worth) and then pay 25% of the mortgage each month from here on out.

I would like to be bought out by my father’s widow or the house be sold. Father’s widow wishes to remain in the house and not buy the 25% share I inherited.

The lawyer stated if I give my 25% share of the house to my father’s widow, I will not have to pay for the 1.5 years worth of mortgage payments that occurred during probate. The 25% share of the house would be worth more than the 1.5 years worth of mortgage payments they claim I owe.

I have not signed any documents assuming mortgage responsibility.

Am I legally responsible for paying the mortgage?