give in to — to finally agree to what someone wants, or to no longer be able to resist something

a person sits on the edge of a couch, reluctantly reaching toward a table loaded with cookies, chips, and candy. Their expression shows internal conflict between wanting to resist and being unable to stop themselves. The person had been trying to avoid the treats but their willpower is crumbling. Their hand moves closer to grab a chocolate cookie despite their earlier determination to eat healthy. A friend nearby watches with understanding as they recognize the familiar struggle. someone finally agreeing to what they want despite trying to resist the temptation