Shah Shoja then occupied Azerbaijan and Arran for four months, until he was forced to turn back when internal conditions in Fars deteriorated. His second brother Shah Muzaffar's son, Shah Yahya, rose in revolt in Isfahan. Having to make peace with the Jalayirids, Shah Shoja offered to marry his son Zain al-Abidin to a sister of the Jalayirid ruler Shaikh Hussain Jalayir. The Jalayirids refused the offer and invaded, although Shah Shoja managed to prevent them from getting any further than Sultaniyya. In 1383, Shah Shoja, whilst intoxicated by alcohol and full of skepticism, had his son Sultan Shebli blinded, which he regretted the following day. A series of other tragedies followed shortly after the blinding of his son—Shah Shoja's mother Makhdum Shah and his nephew Shah Hossein died, whilst he himself received a deadly illness as a result of excessive drinking.