Can wife challenge will of husband to get gratuity and house

Uncle ne House karida(bought) apne daughter(from first wife) ke naam se our loan leya daughter ne apne naam per.uncle ne 2010 me 4the marriage ki,ab dono ki banti nahi hai chacha ne WILL banaker house and graduty apne DAUGHTER ke naam kar diya. Ab uncle and his Daught milkar Aunty ko HOME se nekalne ko try karte hai. Aunty ne police complaint ki our court ne unko permision di rahne ki,ab woh Ground floor par rahti hai uncle first floor par,Daughter married hai. Kya Aunty, Uncle ki will ko challenge kar sakti hai kya house,graduty Aunty ko mile sakti hai ya nahi anty ke alredy 2 young son hai