Garrett and his stepson seem to have been estranged by the time of the Glorious Revolution of 1688, which found them on opposite sides, and Susanna's death sometime before 1689 broke the family tie between them.
When James II landed in Ireland, in order to recover the three kingdoms, Edward's stepfather Garrett Dillon remained loyal to his cause and sat in the so-called Patriot Parliament of 1689.
By contrast, his stepfather was subject to increasing harassment during the 1690s: he eventually fled the country and died in exile in France.
There is no evidence that Edward interceded on his behalf: on the contrary, it is likely that he wanted revenge on Garrett for voting in the Patriot Parliament, of which he was an influential member, to attaint him.
He married in 1685 Katherine, daughter of Sir Oliver St George, 1st Baronet, and his wife Olivia Beresford.