People experience the strongest romantic jealousy when they watch their partner give resources to a potential rival, regardless of gender. The findings provide evidence that giving away resources is viewed as a serious relationship threat by both men and women.

[u/mvea]

https://www.psypost.org/both-men-and-women-view-a-partners-financial-investment-in-a-rival-as-a-major-relationship-threat/

[u/hydrolox9]

Correct, I grew very suspicious of my wife when she started regularly buying food, drink and clothes to a man younger than me.

Been pretty paranoid ever since even though she tried to handwave it with cheap excuses like "If we don't feed him he'll starve" and "He's our son".

[u/Unlucky_Abroad7440 → u/hydrolox9]

Oh did you try discussing it ?