If you google what a Toxic relationship is you get:
"Your relationship may be toxic if it's characterized by behaviors that make you feel unhappy, including disrespect, dishonesty, controlling behaviors, or a lack of support"
Let's just remind ourselves of the what the papers say...oh yeah:
Dailymail: "Williams chief publicly addresses allegations of 'incredibly controlling behaviour' by Geri Halliwell's husband"
The Independent: "the complaint against Christian Horner came from a female colleague and is reported to concern 'inappropriate, controlling behaviour"
The Guardian: "Horner denies claims of controlling behaviour"
Daily Star: "Christian Horner is to be probed over his alleged controlling behaviour amid a vicious Red Bull power struggle, according to reports."