She is married to Connor Mulgrew, with Christine being her mother-in-law.
Before her relationship with Connor, Imogen appeared not to have many friends and was a minor character in the series.
Fasting is obviously nullified by deliberate consumption, intake, or ingestion of food, nutrients, or drinks; sexual intercourse; induction of emission of semen [or, in the case of women, sexual secretions] through masturbation or other activities; induction of vomiting; cupping; onset of menses or bleeding of childbirth; or deliberate intention to break the fast.
The exam you have mentioned does not fall in any of the above categories.
Based on these none of the cases mentioned in the question invalidate/break the wudhu.
Source: Website of Ayatullah Sayyid Ali Husaini Sistani, Islamic Laws, Wudhu » Things which invalidate Wudhu rule #329.
She values her children only so much as the children can benefit her; she is exceptionally self absorbed, sometimes to the point of grandiosity.