Angela is talking to Alicia’s husband’s son’s mother’s sister’s father, and if…

Concept: A blood-relation chain such as “X’s husband’s son’s mother’s sister’s father” is a path through a family tree — each possessive link moves exactly one step to a new relative. As is standard convention in these reasoning puzzles, every relation named (“son”, “wife”, “sister”, etc.) is the couple’s own, direct, unqualified relation unless the puzzle explicitly says otherwise — so “Alicia’s husband’s son” is read as Alicia and her husband’s own son. Resolve the chain left to right, collapsing any link that folds back onto a person already named in the puzzle (for example, under this convention a wife is the mother of her own husband’s son).

Application

1. Alicia’s husband is her spouse; under the standard convention, he and Alicia together have a son (their own, not a stepson from elsewhere).

2. That son’s mother is therefore Alicia herself — the chain “husband’s son’s mother” folds straight back to Alicia.

3. Alicia’s sister, since the question states Angela and Alicia are real (biological) sisters, is Angela.

4. Angela’s father is simply the father who fathered both Angela and Alicia.

5. So the full chain “husband’s son’s mother’s sister’s father” resolves to Angela’s own father — the person Angela is talking to.

Cross-check: Building the family tree bottom-up confirms the same path — the shared father sits at the top with two daughters, Angela and Alicia; Alicia’s husband and their son hang below Alicia; tracing son → mother → sister → father from the bottom lands back on that same top node.

Angela is talking to her own father.