I'm nearly certain that her husband (my father-in-law) is SEI. Probably enneagram 9w1.
Anyway, my mother in law uses a lot of Fe. However, she also seems to be overly preoccupied with Fi so it's hard for me to figure out which is dominant. She's also strong in Si and Se.
She's very much a people-person. She emphasizes relationships and where she stands with people a lot. She's had difficult relations with her ILI sister and ESI son (my husband's brother). She gets along pretty well with her husband (SEI) and mine (ESE). But that could be attributed to things besides type.
She loves sports and is very opinionated about them. I don't think I've ever heard her talk about philosophic ideas or concepts. She's narcissistic. Everything is about her and how it relates to her but those are virtually the only connections she makes. In conversation, she will often make big jumps from topic to topic. There's ZERO connection between what she just said and the next thing that comes out of her mouth. Or she'll pick up a conversation where she left off two hours ago as if you should know exactly what she's thinking and what she's talking about.
She doesn't read any fiction, only self-help and religious material.
Holds grudges forever.
Can be extremely generous but also can be selfish, based on her mood and/or her feeling toward the other person.
I feel like she focuses on the externals--like what's for dinner, what people are doing around her, what's going on, lots of gossip is interesting to her, "have you heard about so-and-so". But she also likes secrets. Likes it when someone trusts her with a secret because that makes her feel special and "close" to you.