The Shayar says that if these sighs (Shola-Afsan) continue in this manner, we will burn our own house all night.

This couplet is a breathtaking display of desperate, overwhelming love. Mir Taqi Mir suggests that if his sighs (आह) continue to be so intensely revealing, so full of pain and passion, then he is prepared to burn down his own home. It's not a literal threat; it's a metaphor for self-immolation. The lover's devotion is so consuming that the pain of separation or the intensity of love itself is enough to destroy everything he holds dear.